Decomposing food waste is releasing thousands of tonnes of planet-warming methane gas at landfills in Buenos Aires, Delhi, Mumbai, and Lahore, new research finds.
With about 570 million tonnes of the greenhouse gas emitted every year from both industrial and natural processes, the concentration of methane in the atmosphere has been increasing at a record pace, according to the
A landfill in Mumbai, for example, was putting out about 9.8 tonnes of methane per hour, or 85,000 tonnes per year, according to the study's findings. The Buenos Aires landfill emitted some 250,000 annual tonnes – or half of the city's total methane emissions. Landfill waste – responsible for about 11 per cent of global methane emissions – is expected to increase about 70 per cent by 2050 as the global population continues to climb, according to the World Bank.
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