永久冻土碳反馈为何被视为难以逆转的风险？
Why is the permafrost carbon feedback treated as a hard-to-reverse risk?
北半球永久冻土区土壤中封存着约 1400 至 1600 吉吨有机碳，相当于当前大气碳库的两倍左右，这些碳在冻结状态下长期不参与循环。升温使活动层加深，微生物开始分解有机质，在有氧条件下释放二氧化碳，在积水的厌氧条件下释放甲烷；热喀斯特塌陷还会突然暴露深层碳。由于冻土形成需要千年尺度，一旦融化释放便难以在人类时间尺度内收回，因此被列为渐进而不可逆的反馈。
Soils of the northern permafrost region hold roughly 1400–1600 gigatonnes of organic carbon, about twice the current atmospheric pool, locked out of the active cycle while frozen. Warming deepens the active layer so microbes begin decomposing that material, releasing carbon dioxide under aerobic conditions and methane in waterlogged anaerobic pockets, while abrupt thermokarst collapse exposes deep carbon suddenly. Because permafrost takes millennia to build, released carbon cannot be recaptured on human timescales, which is why the feedback is classed as gradual but effectively irreversible.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#永久冻土 #碳反馈 #热喀斯特
什么是气候临界点？
What are climate tipping points?
气候临界点指系统在被推过某一阈值后会发生不可逆或自我强化的剧烈变化，如格陵兰冰盖消融和亚马孙退化。一旦触发，变化会自行推进而不依赖进一步升温。识别临界点有助于理解为何早期减排比事后补救更关键。
Climate tipping points are thresholds beyond which a system shifts irreversibly or self-reinforcingly, like Greenland ice loss or Amazon dieback. Once triggered, change proceeds without further warming. Recognising them shows why early cuts beat late fixes.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#气候临界点 #不可逆 #系统变化
剩余碳预算是怎么算出来的？为什么它带有概率标签？
How is the remaining carbon budget calculated, and why does it come with a probability label?
剩余碳预算基于累积二氧化碳排放与升温近似线性的关系，用瞬时气候响应指标（TCRE）乘以剩余可容许升温得出，再扣除非二氧化碳强迫和地球系统反馈的贡献。由于 TCRE 本身是一个分布，预算必须标注实现概率：AR6 估算自 2020 年起把升温控制在 1.5℃ 内、成功率 50% 的预算约为 5000 亿吨二氧化碳。若要求 83% 的成功率，预算会缩减到约 3000 亿吨。
The remaining carbon budget rests on the near-linear relationship between cumulative CO2 emissions and warming, obtained by multiplying the transient climate response to cumulative emissions (TCRE) by the allowable additional warming, then subtracting contributions from non-CO2 forcing and Earth-system feedbacks. Because TCRE is itself a distribution, budgets must be reported with a likelihood: AR6 put the budget from 2020 for a 50% chance of holding 1.5°C at roughly 500 GtCO2. Demanding an 83% chance shrinks it to about 300 GtCO2.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳预算 #TCRE #1.5摄氏度目标
冒纳罗亚站大气 CO₂ 的「季节性振幅」是多少？为何它在增大？
What is the seasonal amplitude of atmospheric CO₂ at Mauna Loa and why is it growing?
冒纳罗亚月均 CO₂ 每年呈锯齿状波动，振幅约 6–8 ppm，由北半球植物夏季吸碳、冬季释放造成。近几十年振幅略有增大，与北半球植被活动增强及生长季延长有关。
Monthly mean CO₂ at Mauna Loa shows a sawtooth of roughly 6–8 ppm amplitude from Northern Hemisphere plants absorbing carbon in summer and releasing it in winter. The amplitude has slightly grown in recent decades, linked to heightened vegetation activity and longer growing seasons.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#冒纳罗亚 #季节性振幅 #大气CO₂
土壤有机碳的千分之四倡议在科学上受到哪些质疑？
What scientific criticisms have been raised against the 4 per 1000 soil carbon initiative?
该倡议在 2015 年巴黎气候大会上提出，主张全球土壤表层有机碳储量每年增加 0.4%，以抵消相当部分的人为排放。质疑集中在几点：0.4% 的增速在退化农田上可行，但在已接近饱和的草地与森林土壤中难以实现；固碳量随时间趋于饱和且高度依赖持续管理，一旦翻耕便迅速逆转；此外土壤碳测量的空间变异极大，几年内难以核查。多数学者认为它是有价值的农田健康议程，但不能替代化石燃料减排。
Launched at the 2015 Paris climate conference, the initiative proposes increasing topsoil organic carbon stocks by 0.4% per year to offset a meaningful share of anthropogenic emissions. Criticism focuses on feasibility: the rate is attainable on degraded croplands but not in grassland and forest soils already near saturation; gains saturate over time and depend on continued management, reversing quickly once soil is tilled; and soil carbon has such high spatial variability that verification over a few years is difficult. Most researchers regard it as a worthwhile soil-health agenda rather than a substitute for cutting fossil emissions.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-04
来源 · Source
Minasny 等（2017）《Geoderma》千分之四土壤碳评估；千分之四国际倡议（COP21，2015）
Minasny et al. (2017), Geoderma, assessment of soil carbon 4 per mille; 4 per 1000 Initiative (COP21, 2015)
独立核验依据 · Independent verification: 核验依据 1 OpenAlex DOI 10.1016/j.geoderma.2017.01.002（记录 W25794867
#土壤有机碳 #千分之四倡议 #碳汇饱和
直接空气捕集的能耗为什么天然高于从烟气中捕碳？
Why does direct air capture inherently need more energy than capturing carbon from flue gas?
分离功随被分离组分的浓度降低而上升：燃煤电厂烟气中二氧化碳体积分数约 12% 至 15%，而大气中只有约 0.04%，热力学最小分离能因此相差数倍以上。实际系统还要处理巨大的空气体积，风机能耗、吸附剂再生温度和设备规模都随之放大，目前示范项目每吨二氧化碳的能耗折算在数吉焦量级。这意味着直接空气捕集必须依托廉价的零碳能源才有净减排意义，通常被定位为处理难减排残余排放和历史排放的手段，而非替代源头减排。
The work of separation rises as the concentration of the target species falls: flue gas from a coal plant is roughly 12–15% carbon dioxide by volume while air is about 0.04%, so the thermodynamic minimum differs by more than a factor of several. Real systems must also move enormous volumes of air, scaling up fan power, sorbent regeneration heat, and equipment size, and demonstration plants consume energy on the order of gigajoules per tonne of carbon dioxide. Direct air capture therefore only delivers net removal when powered by cheap zero-carbon energy, and is best positioned for residual hard-to-abate and historical emissions rather than as a substitute for cutting emissions at source.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-02
来源 · Source
美国国家科学院《Negative Emissions Technologies and Reliable Sequestration》（2019）；国际能源署《Direct Air Capture》报告（2022）
U.S. National Academies, Negative Emissions Technologies and Reliable Sequestration (2019); IEA, Direct Air Capture (2022)
独立核验依据 · Independent verification: 核验依据 1 CROSSREF 标识 10.17226/25259：Negative Emissions Technologi
#直接空气捕集 #分离功 #负排放技术
碳交易市场的基本机制是什么？
What is the basic mechanism of a carbon trading market?
碳市场由政府设定排放总量并分发或拍卖配额，企业实际排放低于配额可出售盈余，超标则需购买。碳价由此反映减排成本并引导资金流向低碳项目。设计不佳会导致价格过低或分配不公。
A carbon market sets a total cap and distributes or auctions allowances; firms below cap sell surplus and those above must buy. The carbon price reflects abatement cost and steers funds to low-carbon projects. Poor design yields low prices or unfair allocation.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳交易 #碳价 #总量控制
为什么说土壤是全球最大的陆地碳库？农业怎么影响它？
Why is soil the largest terrestrial carbon pool, and how does farming affect it?
全球土壤储存的碳约为大气碳库的两到三倍，主要是有机质。传统翻耕会让土壤团聚体破碎、有机质加速氧化分解，释放二氧化碳；而免耕、覆盖作物、施用有机肥等做法能逐年增加土壤碳。每提升土壤有机质0.1个百分点，对保水、肥力和固碳都有可观的累积效应。
Global soils hold about two to three times as much carbon as the atmosphere, mostly as organic matter. Conventional ploughing breaks up soil aggregates and speeds the oxidation of organic matter, releasing CO2, whereas no-till farming, cover crops and organic amendments steadily rebuild soil carbon. Even a 0.1-percentage-point rise in soil organic matter measurably improves water retention, fertility and carbon storage.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#土壤碳 #有机质 #再生农业
湿地既储存碳又排放甲烷，如何评估它的气候作用？
Wetlands both store carbon and emit methane — how should their climate effect be assessed?
湿地长期淹水缺氧，有机碳分解极慢，逐渐累积成巨大的泥炭碳库，占全球土壤碳的很大份额。与此同时，厌氧分解会释放甲烷，而甲烷的温室效应远强于二氧化碳。因此评估不能只看单一方面，而要看净辐射强迫和碳库量级。健康湿地长期封存的碳超过其甲烷排放，恢复退化湿地还能减少额外释放，所以湿地在净效果上仍是气候资产。
Waterlogged anoxic wetland soils slow organic-carbon decomposition, gradually building large peat carbon stocks that hold a big share of global soil carbon. At the same time, anaerobic decay releases methane, a greenhouse gas far stronger than CO2. Assessment therefore cannot look at one side alone but must weigh net radiative forcing and the magnitude of carbon stocks. Because carbon stored over the long term in healthy wetlands outweighs their methane emissions, and restoring degraded wetlands cuts additional releases, wetlands remain a net climate asset.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#湿地碳汇 #甲烷 #泥炭地
水泥行业的碳排放主要来自哪里？
Where do cement industry emissions mainly come from?
水泥排放约六成来自石灰石煅烧的工艺过程本身，碳酸钙分解释放二氧化碳；其余来自粉磨和高温煅烧所烧化石燃料。由于过程排放难以用电替代，行业依赖替代原料、熟料替代和碳捕集来减排。
About 60 percent of cement emissions come from the calcination process itself, as limestone releases CO2, with the rest from grinding and fossil fuel burned for high heat. Process emissions are hard to electrify, so the sector leans on alternative materials, clinker substitution and carbon capture.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#水泥 #过程排放 #碳捕集
什么是直接空气捕集技术？
What is direct air capture technology?
直接空气捕集用化学吸附剂从大气中低浓度的二氧化碳中把它抓取，再用高温或电化学方式释放为高纯气流以便封存或利用。它不受排放源位置限制，但能耗和成本极高，目前规模很小。被视为难以减排领域的补充手段。
Direct air capture uses chemical sorbents to grab CO2 from the atmosphere's low concentration, then releases it as a pure stream via heat or electrochemistry for storage or use. It is not tied to emission sources but extremely energy-intensive and costly, so scale is tiny today. It is seen as a supplement for hard-to-abate sectors.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#直接空气捕集 #碳移除 #负排放
土壤有机碳如何影响气候变化？
How does soil organic carbon influence climate change?
土壤储存的有机碳超过大气和植被碳之和，其微小变化就会影响大气二氧化碳浓度。耕作、排干湿地和升温会加速有机碳分解而释放碳；反之免耕、覆盖作物和泥炭保护可固碳。土壤管理是潜力大且低成本的碳汇选项。
Soils hold more organic carbon than the atmosphere and vegetation combined, so small changes move atmospheric CO2. Tillage, wetland drainage and warming speed decomposition and release carbon; no-till, cover crops and peat protection store it. Soil management is a large, low-cost sink option.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#土壤有机碳 #固碳 #农业
为什么要把不同温室气体折算成“二氧化碳当量”？
Why are different greenhouse gases converted into CO2-equivalent?
不同温室气体的增温能力和在大气中的寿命差别很大。全球变暖潜势（GWP）把1千克某种气体在给定时间内（通常100年）的增温效果，折算成二氧化碳的倍数：如甲烷100年GWP约28，一氧化二氮约273（IPCC AR6最新值）。把各类排放乘以其GWP后相加，就得到“二氧化碳当量”，方便政策统计和比较减排效益。
Greenhouse gases differ hugely in warming strength and atmospheric lifetime. The Global Warming Potential (GWP) converts the warming caused by 1 kg of a gas over a set period (usually 100 years) into the equivalent amount of CO2: methane has a 100-year GWP of about 28, nitrous oxide about 273 (latest IPCC AR6 values). Multiplying each emission by its GWP and summing gives CO2-equivalent, which lets policymakers tally emissions and compare reduction options on one scale.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#全球变暖潜势 #二氧化碳当量 #甲烷
碳捕集与封存（CCS）是怎样工作的？它能解决气候问题吗？
How does carbon capture and storage (CCS) work, and can it solve climate change?
CCS在电厂或工厂的烟囱处捕集二氧化碳，压缩后注入深部地质构造（如废弃油气藏、咸水层）永久封存，或转化为产品利用。它的意义是让现有化石燃料和工业流程也能“低碳运行”，但捕集能耗大、成本高、规模有限，IPCC强调它是实现净零排放的补充手段，不能替代大幅削减排放本身。
CCS captures CO2 at power plants or industrial stacks, compresses it and injects it deep underground (into depleted oil fields or saline aquifers) for long-term storage, or converts it into products. It lets existing fossil and industrial processes run with far lower emissions, but it is energy-intensive, costly and still limited in scale. The IPCC stresses that CCS is a complement to deep emission cuts, not a substitute for them.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳捕集 #CCS #封存
企业核算中的范围三排放为什么最难量化，却往往占比最大？
Why are Scope 3 emissions the hardest to quantify yet usually the largest share of a company's footprint?
温室气体核算体系把排放分为三类：自有设施的直接排放为范围一，外购电力和热力为范围二，价值链上下游的其他排放为范围三，包括采购商品与服务、运输、员工通勤、产品使用与废弃处理等十五个类别。范围三之所以难算，是因为数据掌握在供应商和用户手中，企业只能依赖行业平均排放因子或支出型估算，重复计算与边界划分争议随之出现。但对零售、金融和消费品企业而言，范围三常占总排放的七成以上，忽略它等于回避了主要减排空间。
The Greenhouse Gas Protocol splits emissions into Scope 1 from owned operations, Scope 2 from purchased electricity and heat, and Scope 3 for everything else across the value chain, spanning fifteen categories from purchased goods and services to transport, commuting, product use, and end-of-life treatment. Scope 3 is hard to measure because the data sit with suppliers and customers, forcing companies to rely on industry-average emission factors or spend-based estimates, which invites double counting and boundary disputes. Yet for retail, financial, and consumer-goods firms Scope 3 often exceeds 70% of the total, so ignoring it means avoiding the bulk of the abatement opportunity.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
《温室气体核算体系：企业价值链（范围三）核算与报告标准》（世界资源研究所与世界可持续发展工商理事会）；科学碳目标倡议（SBTi）净零标准
GHG Protocol Corporate Value Chain (Scope 3) Accounting and Reporting Standard (WRI and WBCSD); Science Based Targets initiative Net-Zero Standard
#范围三排放 #温室气体核算体系 #价值链
什么是生物炭，它如何固碳？
What is biochar and how does it store carbon?
生物炭是生物质在缺氧下热解得到的稳定炭，结构多孔且抗分解。施入土壤后可存留数十年甚至更久，把碳锁在地下并改善保水和肥力。其净固碳效果取决于原料来源和避免与能源用途竞争。
Biochar is stable carbon made by heating biomass without oxygen; it is porous and resistant to decay. Added to soil it can persist for decades, locking carbon underground while improving water retention and fertility. Net storage depends on feedstock and avoiding competition with energy use.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#生物炭 #热解 #土壤固碳
什么是 Revelle 因子（缓冲因子）？它如何影响海洋吸收 CO₂？
What is the Revelle factor (buffer factor) and how does it affect ocean CO₂ uptake?
Revelle 因子描述海水碳酸盐化学对额外 CO₂ 的非线性响应，数值约 9–13。它意味着海洋吸收人为 CO₂ 的效率随浓度升高而下降，因为碳酸根被消耗、缓冲能力减弱。
The Revelle factor describes the nonlinear carbonate chemistry of seawater to added CO₂, with values around 9–13. It means the ocean's efficiency at taking up anthropogenic CO₂ falls as concentrations rise, because carbonate is consumed and buffering weakens.
难度 专业 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#Revelle因子 #海洋化学 #碳缓冲
生命周期评估在碳足迹核算中起什么作用？
What role does life-cycle assessment play in carbon footprint accounting?
生命周期评估系统量化产品从原料获取、制造、运输、使用到废弃各阶段的温室气体排放，避免只盯某一环节而遗漏转移。它依赖清单数据和影响评价方法，是碳足迹核算的国际通用框架。结果透明与否取决于系统边界和数据质量。
Life-cycle assessment systematically quantifies a product's greenhouse emissions from raw material, manufacturing, transport, use to disposal, avoiding blind spots from focusing on one stage. It relies on inventory data and impact methods and is the international framework for footprints. Transparency depends on system boundaries and data quality.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-05
来源 · Source
国际标准化组织（ISO）,《DIN EN ISO 14040:2009-11, Umweltmanagement_- Ökobilanz_- Grundsätze und Rahmenbedingungen (ISO_14040:2006); Deutsche und Englische Fassung EN_ISO_14040:2006》,ISO 14040:2006 (DOI: 10.31030/1555059)
ISO, 'DIN EN ISO 14040:2009-11, Umweltmanagement_- Ökobilanz_- Grundsätze und Rahmenbedingungen (ISO_14040:2006); Deutsche und Englische Fassung EN_ISO_14040:2006', ISO 14040:2006, DOI: 10.31030/1555059
独立核验依据 · Independent verification: 核验依据 1 Crossref DOI 10.31030/1555059; ISO 14040:2006
#生命周期评估 #碳足迹 #系统边界
如何判断一个碳信用是否“高诚信”？
How can you tell whether a carbon credit has high integrity?
高诚信碳信用必须满足核心碳原则。具体包括：额外性，即没有资金支持项目就不会发生；永久性，即碳不会在短期内回归大气；稳健量化，即不发生重复计算；还要对可持续发展有贡献，并经过独立的第三方审定。ICVCM等组织正在对信用类别进行评估分级，帮助买方辨别优劣。同时监管强调，碳信用只能作为处理剩余排放的最后手段。
A high-integrity carbon credit must meet the Core Carbon Principles. Concretely these include additionality — the project would not happen without funding; permanence — the carbon will not soon return to the atmosphere; robust quantification — no double counting; plus contributions to sustainable development and independent third-party validation. Bodies such as ICVCM are grading credit categories to help buyers distinguish quality. Regulators also stress that credits are only a last resort for residual emissions.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#碳信用质量 #核心碳原则 #自愿碳市场
再生农业如何固碳？其潜力为什么存在争议？
How does regenerative agriculture sequester carbon, and why is its potential debated?
再生农业通过免耕、覆盖作物、轮作和施用堆肥来增加土壤有机质，把大气中的碳转入土壤碳库。这样做还能同时改善土壤保水能力并提升生物多样性。但土壤固碳速率会逐年递减、最终趋于饱和，而且碳难以精确测量，翻耕后又容易重新释放。因此把土壤碳当作碳信用的核算标准仍有争议，业界的共识是：再生农业作为农业转型路径的价值，大于单纯用于抵消。
Regenerative agriculture builds soil organic matter through no-till, cover crops, rotation, and compost, transferring atmospheric carbon into the soil carbon pool. These practices also improve water retention and biodiversity. But soil carbon accrual slows year by year and eventually saturates; the carbon is hard to measure precisely and is easily released again by tillage. Accounting soil carbon as credits is therefore still contentious, and the field's consensus is that regenerative agriculture's value as a transition path outweighs using it purely for offsetting.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-04结论有争议 · Contested
来源 · Source
Minasny 等（2017）《Geoderma》千分之四土壤碳评估；千分之四国际倡议（COP21，2015）
Minasny et al. (2017), Geoderma, assessment of soil carbon 4 per mille; 4 per 1000 Initiative (COP21, 2015)
独立核验依据 · Independent verification: 核验依据 1 OpenAlex DOI 10.1016/j.geoderma.2017.01.002（记录 W25794867
#再生农业 #土壤碳 #免耕
什么是碳足迹？通常怎样测算？
What is a carbon footprint and how is it usually measured?
碳足迹指个人、产品或活动在全生命周期中排放的温室气体总量，常用二氧化碳当量（CO₂e）表示。测算多采用生命周期评估（LCA），把原料、制造、运输到使用各环节的排放加总。
A carbon footprint is the total greenhouse gas emissions of a person, product, or activity over its life cycle, usually expressed in CO₂-equivalents. It is typically measured by life-cycle assessment (LCA), summing emissions from materials, manufacturing, transport, and use.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
世界资源研究所与 WBCSD《温室气体核算体系产品寿命周期标准》(GHG Protocol Product Standard, 对应 ISO 14067)
WRI & WBCSD, GHG Protocol Product Life Cycle Standard (cf. ISO 14067)
#碳足迹 #生命周期评估 #温室气体
碳在地球系统中主要在哪些圈层间循环？
Between which Earth-system reservoirs does carbon mainly cycle?
碳在大气、海洋、陆地生物圈和岩石圈之间流动，通过光合作用、呼吸、溶解和沉积等过程交换。大气中的碳主要以二氧化碳存在，海洋是最大的活跃碳库。人类活动正把岩石圈封存的碳快速释放到大气。
Carbon moves among the atmosphere, oceans, land biosphere and geosphere through photosynthesis, respiration, dissolution and sedimentation. Atmospheric carbon is mainly CO2, while the ocean is the largest active reservoir. Human activity is rapidly moving carbon locked in the geosphere into the atmosphere.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳循环 #碳库 #地球系统
生态足迹与碳足迹有什么区别？
What is the difference between ecological footprint and carbon footprint?
生态足迹衡量维持消费所需的全部生物生产性土地，包含碳、耕地、林地、渔业和建设用地等分项。碳足迹只聚焦温室气体排放折算的二氧化碳当量，是生态足迹中碳账户的部分。两者口径不同，不宜直接比较大小。
An ecological footprint measures all biologically productive land needed to sustain consumption, including carbon, cropland, forest, fisheries and built-up areas. A carbon footprint focuses only on greenhouse-gas emissions in CO2 equivalent, the carbon account within the ecological footprint. Their scopes differ and should not be directly compared.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#生态足迹 #碳足迹 #可持续
什么叫碳泄露？
What is carbon leakage?
碳泄露指一个地区因严格气候政策提高排放成本，导致高碳产业转移到管制较松的地区，全球排放并未减少。它也可能表现为本地减产而改从外地高碳进口。边境碳调节机制正是为缓解这一问题而设计。
Carbon leakage occurs when strict climate policy raises local emission costs and pushes carbon-intensive industry to looser jurisdictions, so global emissions do not fall. It can also appear as local output dropping while high-carbon imports rise. Border carbon adjustment is designed to address this.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳泄露 #产业转移 #气候政策
碳标签是什么？它为什么会出现在商品包装上？
What is a carbon label, and why is it appearing on product packaging?
碳标签在商品上公布产品从原料、生产、运输到使用处置全过程的温室气体排放量，让“低碳”变得看得见、可比较。它既能帮消费者做环保选择，也促使企业改进工艺、降低碳成本。由于各国核算方法还不统一，碳标签的国际互认仍在推进之中。
A carbon label displays the total greenhouse gases emitted across a product's life — from raw materials and production to transport, use and disposal — making low-carbon choices visible and comparable. It helps consumers pick greener options and pushes companies to trim emissions and costs. Because accounting rules still differ between countries, mutual recognition of carbon labels is still being developed.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
中国科学院（碳足迹与碳标签研究）；WRI
CAS (carbon footprint and labelling research); WRI
#碳标签 #全生命周期 #绿色消费
什么是“蓝碳”？为什么红树林的固碳能力这么突出？
What is blue carbon, and why are mangroves so good at locking away carbon?
蓝碳指红树林、海草床、盐沼等海岸带生态系统固定的碳。它们虽然面积不大，但单位面积的固碳速率可以超过热带雨林，而且碳被储存在缺氧的沉积物中，能保存数百年到上千年。保护蓝碳生态系统既固碳，又能护岸防洪、保育鱼类，是“一石多鸟”的自然方案。
Blue carbon is the carbon captured by coastal ecosystems — mangroves, seagrass beds and salt marshes. Covering little area, they still sequester carbon faster per hectare than many tropical forests, and the carbon is locked in oxygen-poor sediments where it can stay for centuries or millennia. Protecting them stores carbon while also defending coasts, holding back floods and sheltering fish — a multi-benefit natural solution.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#蓝碳 #红树林 #海草床
植树造林为何不是万能的固碳手段？
Why is tree planting not a universal carbon fix?
新造林固碳速度有限且碳可能随火灾或采伐重新释放，在原生草原或泥炭地造林反而破坏原有碳库。此外树木吸收仅为人为排放的一小部分，无法替代减排。宜林则林、宜草则草才能避免负面效应。
New forests store carbon slowly and it can return via fire or harvest, while planting on native grassland or peat releases stored carbon. Trees absorb only a fraction of human emissions and cannot replace cutting them. Matching vegetation to land avoids harm.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#植树造林 #固碳局限 #适宜性
“食物里程”为什么只是食物碳足迹的一部分？
Why are food miles only part of a food's carbon footprint?
食物里程指食物从产地到餐桌的运输距离，它直观易懂，却不能代表全部排放：生产环节（化肥、能源、甲烷）往往占比更高。例如本地温室生产的番茄，因供暖可能比长途运输的露天番茄排放更高。完整的评估应看生命周期排放，而不是只看距离。
Food miles measure transport distance from farm to table — intuitive, but not the whole story: production stages (fertilizers, energy, methane) often dominate. Locally grown hothouse tomatoes, for instance, can out-emit far-travelled field tomatoes because of heating. A complete assessment uses life-cycle emissions, not distance alone.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#食物里程 #碳足迹 #生命周期
海洋酸化与碳循环有何关系？
How is ocean acidification related to the carbon cycle?
海洋吸收约四分之一人为二氧化碳，溶解后生成碳酸使海水pH下降，即海洋酸化。酸度升高削弱珊瑚和贝类构建碳酸钙外壳的能力。这反过来影响海洋碳泵和生物固碳。
The ocean absorbs about a quarter of anthropogenic CO2; dissolved, it forms carbonic acid and lowers seawater pH, i.e. ocean acidification. Higher acidity weakens corals' and shellfish's ability to build calcium-carbonate shells. This in turn affects the ocean carbon pump and biological storage.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#海洋酸化 #二氧化碳 #碳酸钙
如何监测一片森林吸收了多少碳？
How is the amount of carbon absorbed by a forest monitored?
常用方法有三种：地面样地测量树木直径与高度推算生物量；激光雷达或卫星遥感估算冠层和面积变化；碳通量塔直接测定二氧化碳交换。把样地调查与遥感结合，就能追踪森林碳储量的变化，这些数据也支撑着各国的碳清单报告。
Three methods are common: field plots measuring trunk diameter and height to estimate biomass; LiDAR or satellite remote sensing of canopy and area change; and eddy-covariance flux towers directly measuring CO2 exchange. Combining plots with remote sensing tracks changes in forest carbon stocks, data that underpin national carbon inventories.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳监测 #遥感 #碳通量塔
碳信用（碳抵消）是如何运作的？为什么不能替代自身的减排？
How do carbon credits (offsets) work, and why can't they replace cutting your own emissions?
购买碳信用，相当于出资支持一个经认证的减排或固碳项目（如保护森林、推广清洁炉灶），换取等量的“抵消”额度。但碳信用面临“额外性”和“永久性”问题——如果项目本就会发生，或者碳之后又被释放，抵消就会失真。因此碳信用只是补充，真正的减排必须发生在自身价值链内。
Buying a carbon credit funds a certified emission-reduction or carbon-removal project (e.g., forest protection, clean cookstoves) in exchange for offsetting an equal amount of your own emissions. But credits face additionality and permanence problems — if the project would have happened anyway or the carbon is later released, the offset is hollow. Credits are therefore a supplement; real reductions must happen inside your own value chain.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
GHG Protocol
GHG Protocol
#碳信用 #碳抵消 #额外性
海洋「生物碳泵」是什么？它如何封存二氧化碳？
What is the oceanic biological carbon pump and how does it sequester CO₂?
浮游植物通过光合作用吸收表层 CO₂，死后遗体下沉，把碳带到深海长期封存，称为生物泵。它每年向深海输送数十亿吨碳，是地球碳循环的关键环节。
Phytoplankton photosynthesize and absorb surface CO₂; when they die, their remains sink, carrying carbon to the deep sea for long-term storage—the biological pump. It delivers billions of tonnes of carbon to the deep ocean each year, a key part of the carbon cycle.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#生物碳泵 #海洋碳汇 #浮游植物
建筑的“隐含碳”与“运行碳”有何区别？为什么随着电网低碳化和节能标准收紧，隐含碳越来越受重视？
How do embodied carbon and operational carbon differ in buildings, and why is embodied carbon gaining attention as grids decarbonize and efficiency codes tighten?
隐含碳来自水泥、钢材等建材的生产运输和现场施工，发生在建筑投用之前；运行碳是供暖、制冷、照明等用能逐年累积的排放。当电力脱碳与节能设计压低运行排放后，隐含碳在全生命周期中的占比持续上升。改用低碳混凝土与木结构、复用构件并开展全生命周期核算，才能堵住这部分前期排放。
Embodied carbon comes from producing and transporting materials such as cement and steel plus on-site construction, all before a building opens; operational carbon accumulates year by year from heating, cooling and lighting. As cleaner electricity and efficient design shrink operational emissions, the embodied share of whole-life carbon keeps rising. Switching to low-carbon concrete and timber, reusing components and running full life-cycle accounting are needed to close this upfront gap.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
出处备注：本题原挂出处与答案内容不符，已撤回；具体书目待补，暂不展示来源。
本题原挂出处与答案内容不符，已撤回；具体书目待补。
Previous citation withdrawn as unsupported for this answer; a specific source is pending.
#隐含碳 #运行碳 #全生命周期核算
甲烷的增温潜势为何远高于二氧化碳？
Why is methane's warming potential far higher than carbon dioxide's?
甲烷在二十年的时间尺度上单位质量的增温效应约为二氧化碳的八十多倍，因其红外吸收能力强。但它的大气寿命只有约十二年，远短于二氧化碳的百年以上，所以长期潜势会下降。控制甲烷是见效快的短期减缓路径。
Methane's warming effect per unit mass is over 80 times that of CO2 over 20 years because of strong infrared absorption. But its atmospheric lifetime is only about 12 years, far shorter than CO2's centuries, so its long-term potential drops. Controlling methane is a fast-acting short-term mitigation path.
难度 进阶 · 适合 初中(12-15)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#甲烷 #增温潜势 #短期减缓
什么是碳足迹计算器？
What is a carbon footprint calculator?
碳足迹计算器通过询问出行、用电、饮食和购物等习惯，估算个人每年的温室气体排放量。它帮助直观看到哪些行为贡献最大，从而指导减排。结果受排放因子和更新频率影响，仅供相对比较。
A carbon footprint calculator estimates a person's annual greenhouse-gas emissions from questions about travel, electricity, diet and shopping. It shows which behaviours contribute most and guides cuts. Results depend on emission factors and update frequency, so they are best for relative comparison.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳足迹计算器 #个人排放 #减排
我们身体里的碳是从哪里来的？
Where does the carbon in our body come from?
我们吃植物和动物，它们用空气中的二氧化碳长大，这些碳就进入我们的身体。所以你身体里的一部分碳，曾经飘在空气里。
We eat plants and animals that grew by using carbon dioxide from the air, so that carbon ends up in our bodies. Part of the carbon in you was once floating in the air.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳循环 #食物链 #二氧化碳
什么是碳汇，森林和海洋如何固碳？
What is a carbon sink, and how do forests and oceans store carbon?
碳汇是从大气中吸收并长期储存碳的自然或人工系统。森林通过光合作用把二氧化碳转为木质生物质并储存在土壤；海洋通过物理溶解和生物泵把碳带入深层。保护和恢复这些碳汇是减缓气候变化的重要手段。
A carbon sink absorbs and stores carbon from the atmosphere over the long term, naturally or artificially. Forests convert CO2 into woody biomass via photosynthesis and store it in soils; oceans take it up by physical dissolution and the biological pump into the deep. Protecting and restoring these sinks is key to climate mitigation.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#碳汇 #森林 #海洋
个人碳足迹通常包括哪些组成部分？
What components usually make up a personal carbon footprint?
个人碳足迹主要来自居家能源、交通出行、饮食和所购商品与服务四类。对多数人而言，开车和飞行、住宅供暖制冷以及肉类消费往往占大头。记账式App可帮助识别最大的减排空间。
A personal carbon footprint mainly comes from home energy, transport, diet and purchased goods and services. For most people, driving and flying, home heating and cooling, and meat consumption dominate. Tracking apps help identify the biggest reduction opportunities.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23
来源 · Source
IPCC AR6 第一工作组报告,Cambridge University Press,2021
IPCC AR6 WG1, Climate Change 2021: The Physical Science Basis, CUP, 2021
#个人碳足迹 #出行 #饮食
什么是地球超载日？
What is Earth Overshoot Day?
地球超载日是全球在一年内耗尽当年可再生资源预算的日期，之后人类便在透支自然资本。它由生态足迹与地球生物承载力之比推算，近年多在每年八月初。推迟这一日期需要降低消费和提高资源效率。
Earth Overshoot Day is the date when humanity has used up the year's renewable resource budget, after which it runs a deficit. It is calculated from the ecological footprint versus Earth's biocapacity and now usually falls in early August. Pushing it later needs lower consumption and higher resource efficiency.
难度 入门 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
来源 · Source
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Global Footprint Network
Global Footprint Network
#地球超载日 #生态赤字 #资源