燃烧甲烷产生二氧化碳，然后释放到大气中。
The burning of methane generates carbon dioxide that is released into the atmosphere.
按20年的平均数字，甲烷产生的热量比二氧化碳多72倍。
Averaged over 20 years, methane traps around 72 times more heat than CO2.
在不同施肥及水稻品种的稻田土壤中也观测到不同的甲烷产生率。
Different methane production rates are found in the paddy fields treated by different fertilizers and rice varieties.
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