When most people think of the cause of greenhouse gases, they see images of factories and cars belching carbon dioxide into the atmosphere.
In Brazil, the blame is being put on cows and the ranchers who raise them.
According to a study by Brazilian university researchers published by the newspaper Folha de Sao Paulo, the cattle-farming sector accounted for one billion tones of Brazil's greenhouse gases in 2005, or half of the country's total.
The slash-and-burn deforestation of vast areas of the Amazon to make short-lived pastures is the worst contributor, followed by the methane released by cow burps and farts.
Not content with ruining their own environment, they are destroying our beef industry as well.