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Methane is one of the three most important gases that cause the earth’s lower atmosphere to warm. It is produced by cud-chewing animals, such as cows and sheep, as part of their normal digestive process. The average New Zealand dairy cow produces 90 kilograms of methane per year, mainly by burping.
Te whakamahi i tēnei tūemi
Reference: CN45566/11
by Lloyd Homer
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