According to a new study by the University of New South Wales, farming kangaroos instead of sheep or cattle could lower national greenhouse gases in Australia by 3 percent a year.

Methane from burps and farts of cows and sheep is an often overlooked contributor to global warming, but it accounts for 67% of Australia’s agricultural sector methane emissions. It also contributes 11% of Australia’s total emissions. In contrast, kangaroos barely produce any methane.

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Australian scientists say giving cows and sheep kangaroo-style stomachs could help reduce greenhouse gas emissions; unlike the flatulence from cows and sheep, kangaroo emissions contain no methane.