Rice paddies are not environmentally friendly since the process for growing rice releases large amounts of methane into the air. World methane production due to paddy fields has been estimated to be in the range of 50 to 100 million tonnes per annum.
Most rice paddies are known to produce methane. The reason behind this is that “prevailing agricultural practices create a complex interaction between factors known to have a major effect on methane and nitrous oxide emissions from rice fields, namely, intermittent flooding and use of organic fertilizers.” In some parts of the world, such as China, farmers are largely dependent on nitrogen fertilizers. Under the hot weather conditions of such tropical areas, the organic material tends to decompose faster. This, and the addition of farmyard manure, increases emissions of methane emissions from rice fields.
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