"LONDON - 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 U.S. National Oceanic and Atmospheric Administration.
In some countries, the biggest source is agricultural fields and farm animals — particularly cows but also livestock and chickens. In the United States, the oil and gas industry is largely responsible.
Yet there is another major global source – garbage.
With data from a satellite-mounted detector showing high methane levels over cities in India, Pakistan and Argentina, a team of scientists looked more closely to pin down the emissions sources."