ghost_in_shell
let's do it.
根据网上数据：
1. 人类每年约制造排放三千六百亿公吨 二氧化碳 （36 billion metric tons of CO2）。
2. 每颗成年树木每年可以吸收22公斤的二氧化碳
3. 地球上约有3万亿棵树木 （3 trillion trees）。
如果我的计算没错，地球上的树木每年可以吸收66万亿公斤的二氧化碳，即660亿公吨二氧化碳 (66 billion metric tons of CO2)，1.8倍于人类每年制造排放的总量。其中还不包括小型灌木草类及藻类植物的吸收量（藻类植物的固碳效果比树木更佳）。
现在世界各国的环保组织，政府积极推行的碳零排放计划 (net-zero carbon emissions)是基于什么理论数据？全球那么多科学家，政府官员，80亿人口，难道都没有认真计算过人类活动制造的emissions究竟会不会超过自然界的中和能力从而增加大气中CO2的浓度？还是我的理解和计算出错了？
According to online data:
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Human activities generate approximately 36 billion metric tons of carbon dioxide (CO2) emissions annually.
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Each mature tree can absorb 22 kilograms of carbon dioxide per year.
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There are approximately 3 trillion trees on Earth.
If my calculations are correct, the trees on Earth can absorb around 66 trillion kilograms of carbon dioxide annually, equivalent to 66 billion metric tons of CO2. This is 1.8 times the total annual emissions produced by human activities. This calculation does not include the absorption capacity of small shrubs, grasses, and algae (algae, in particular, has a better carbon sequestration efficiency than trees).
The current global initiatives, such as net-zero carbon emissions plans, promoted by environmental organizations and governments worldwide, are based on what theoretical data? With numerous scientists, government officials, and a global population of 8 billion people, has there been a thorough calculation to determine whether human activities will exceed the Earth's natural capacity to neutralize emissions, thereby increasing the concentration of CO2 in the atmosphere? Or is my understanding and calculation incorrect?
