2021 年 科学研究发现，通过航空调查，美国垃圾填埋场的甲烷排放量比报告的高 40%。 2021 Science study finds US landfill methane emissions 40% higher than reported, using aerial surveys.

《科学》杂志发表的一项研究显示，美国主要垃圾填埋场的甲烷排放量被严重低估，实际排放量比之前公布的数字高出 40%。 A study published in Science reveals that methane emissions from major US landfills are significantly underreported, with actual emissions being 40% greater than previously stated. 该研究利用航空调查来确定数百个废物场的点源排放，与传统调查方法相比具有重要优势。 The study utilized aerial surveys to identify point source emissions from hundreds of waste sites, providing crucial advantages over traditional survey methods. 甲烷是一种强效温室气体，其在大气中最初 20 年的升温能力是二氧化碳的 80 倍以上，主要是由垃圾填埋场中的有机材料分解产生的。 Methane, a potent greenhouse gas with over 80 times the warming capacity of carbon dioxide during its first 20 years in the atmosphere, is primarily generated from decomposing organic materials in landfills. 垃圾填埋场的甲烷排放量约占全球甲烷排放量的 20%，是继农业和化石燃料之后的第三大排放源。 Methane emissions from landfills constitute approximately 20% of global methane emissions and are the third leading contributor after agriculture and fossil fuels.