“生物燃料不增加净碳”的说法忽略了哪些土地利用代价？
What land-use costs does 'biofuels add no net carbon' overlook?
若为原料新开农田而砍伐森林或排干湿地，释放的碳远超燃料节省；化肥与运输也有排放。只有用废弃物或边际土地、全生命周期核算，才谈得上减碳。
If new farmland clears forest or drains wetland, the released carbon dwarfs fuel savings, plus fertilizer and transport emissions. Only waste feedstocks or marginal land with full life-cycle accounting truly cut carbon.
难度 专业 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#生物燃料 #土地利用 #间接排放
什么是“生物降解”与“可堆肥”标签的真实含义？
What do 'biodegradable' and 'compostable' labels really mean?
可堆肥通常指符合标准（如EN13432）在工业堆肥条件下降解且不留毒残；生物降解则模糊，可能只需“最终”分解，未必在特定环境快速完成，易被用作营销。
'Compostable' usually meets a standard (e.g., EN13432) degrading in industrial compost without toxic residue; 'biodegradable' is vague—may only mean eventual breakdown, not fast in a given setting, and is often used in marketing.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#生物基 #标签 #误导
以秸秆等农业残余制“生物基材料”有哪些环境与粮食安全权衡？
What environmental and food-security trade-offs arise in making bio-based materials from crop residues?
秸秆还田本是保墒沃土、固碳的重要环节；大量取用作材料可能削弱土壤有机质、增加化肥需求。还需比较种植与加工的全周期能耗与排放。
Returning straw to soil preserves moisture, fertility and carbon; harvesting it heavily for materials can deplete soil organic matter and raise fertilizer demand. Full life-cycle energy and emissions must be compared.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#生物基 #秸秆 #权衡
什么是“菌丝体包装”？
What is mycelium packaging?
用真菌菌丝在农业废料上生长、定型成缓冲包装，可堆肥降解，是泡沫塑料的潜在替代。生产能耗低、原料为废弃物。
Fungal mycelium grows on agricultural waste into molded protective packaging that composts, a potential foam-plastic alternative. Low production energy and waste feedstock.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-08-23 · 2 条独立证据
来源 · Source
G. Tyler Miller,《Living in the Environment》Cengage 多版
G. T. Miller, Living in the Environment, Cengage Learning, various editions
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL66394W：Living in the environment
#生物基 #包装 #替代