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STORY: Landfills around the world release lots of methane due to decomposing food wasteSource: Science Advances studyA satellite-mounted detector showed high methane levels over cities in India, Pakistan and ArgentinaHigh-resolution satellite images snapped in 2020 revealed the gas was coming from upwind landfillsOne Mumbai landfill, for example, was putting out over 94,000 tons of methane per yearMeanwhile a Buenos Aires landfill emitted just under 276,000 annual tons That’s half of the city's total methane emissionsLandfill waste is responsible for about 11% of global methane emissionsand is expected to increase about 70% by 2050 as the global population continues to climbSource: World BankMitigation steps might include food composting or capturing the methane for biogas