绿色和清洁能源正在逐步替代传统的化石类能源,成为推动人类社会进步的主角。但与化石类能源遇到的问题一样,使用清洁能源也存在排放问题,只是排放物及危害不同而已。其原因是由于在使用生物燃料时排放到大气中的乙醇容易变为乙醛,而乙醛又非常容易起化学反应,被认为对人体健康有害。研究清洁能源的排放问题,首先必须了解和掌握其排放的主要物质和危害。来自美国的研究人员发现,在使用生物燃料的过程中,未燃烧完的乙醇是主要排放物,而这种乙 Green and clean energy are gradually replacing the traditional fossil fuels and become the protagonists in promoting the progress of human society. However, like the problems encountered in fossil-related energy sources, the issue of emission also exists in the use of clean energy, except that emissions and hazards are different. The reason is that ethanol, which is released into the atmosphere when biofuels are used, easily becomes acetaldehyde, and acetaldehyde is highly susceptible to chemical reactions and is considered to be harmful to human health. To study the issue of clean energy emissions, we must first understand and master the main substances and hazards of their emissions. Researchers from the United States found that unburnt ethanol was the main source of emissions during the use of biofuels, and that this B