地球碳封存能力上限是多少？国际最新研究预计为1.46万亿吨

Core Insights - The Earth's geological carbon storage capacity is estimated to be 1.46 trillion tons, according to a recent study published in the journal Nature [1][3] - This capacity may be reached by the year 2200 under current warming mitigation scenarios, prompting countries to reconsider the role of carbon storage in their emission reduction plans [1][3] Group 1: Research Findings - The study indicates that to achieve net-zero carbon emissions, the amount of carbon dioxide emitted must be balanced by the amount sequestered [1] - Carbon capture and storage (CCS) technology can potentially sequester emissions in geological formations for hundreds or thousands of years [1] - The cautious estimate of the Earth's geological carbon storage potential is 1.46 trillion tons, which could mitigate global warming by up to 0.7°C [3] Group 2: Geographic and Technical Considerations - Approximately 70% of the carbon storage potential is located on land, with high storage potential countries including Russia, the United States, China, Brazil, and Australia [3] - The study's limitations include not accounting for barriers to the scaling of carbon capture and storage technologies or potential future technological advancements [3] - Decision-makers are urged to clarify the estimated need for carbon storage and plan strategies to mitigate carbon emissions accordingly [3]