最新研究显示氢排放间接加剧全球变暖

Core Viewpoint - Hydrogen emissions may indirectly exacerbate global warming, necessitating attention to their impact to ensure hydrogen serves as a clean energy source [1][3]. Group 1: Research Findings - A study by the Global Carbon Project indicates that cumulative hydrogen emissions from 1990 to 2020 contributed to a 0.02°C increase in global average temperature [3]. - The primary reason hydrogen exacerbates global warming is its consumption of natural substances in the atmosphere that break down greenhouse gases like methane [3]. - Increased hydrogen in the atmosphere reduces these natural purifiers, extending methane's atmospheric lifetime and contributing to warming [3]. Group 2: Sources of Hydrogen Emissions - The rise in global hydrogen emissions from 1990 to 2020 is primarily attributed to human activities, particularly the decomposition of compounds like methane [5]. - The rapid increase of methane in the atmosphere is linked to fossil fuel use, agricultural production, and landfill activities [5]. - There exists a vicious cycle where methane decomposition produces hydrogen, and increased methane leads to more hydrogen, which in turn prolongs methane's atmospheric presence, causing further harm [5]. Group 3: Implications for Clean Energy - The indirect effects of hydrogen emissions on global warming may diminish the benefits of using hydrogen energy as a substitute for fossil fuels [5].