源头降碳与碳移除“双轨”方案有望加速减排

Core Viewpoint - The research emphasizes the necessity of both source reduction and carbon removal strategies to achieve global carbon neutrality and mitigate climate change effectively [2][3]. Group 1: Source Reduction - Source reduction is a critical approach for countries worldwide, focusing on decreasing fossil fuel usage through renewable energy sources like wind and hydrogen [1]. - Current carbon emission rates indicate that the remaining carbon budget to limit global warming to 1.5°C may be exhausted within the next five years, highlighting the insufficiency of relying solely on source reduction [2]. Group 2: Carbon Removal - Carbon removal is identified as a vital measure for reducing global carbon emissions and cooling the planet, yet current climate policies primarily focus on achieving net-zero emissions without detailing how to balance source reduction and carbon removal [2]. - The potential risks of large-scale carbon removal technologies include significant land use and increased water resource consumption, which could threaten human survival [2]. Group 3: Dual Target Strategy - Researchers propose setting independent targets for source reduction and carbon removal, advocating for a dual approach to achieve overall net-zero goals [2]. - This strategy is believed to accelerate the reduction process and foster the development of carbon removal technologies, addressing the challenges of carbon removal and global decarbonization [2][3]. Group 4: Effectiveness of Target Setting - Studies indicate that separately setting targets for source reduction and carbon removal yields better outcomes in terms of short-term carbon reduction, timelines for achieving carbon neutrality, and the onset of negative carbon emissions [3].