Plants Add More Greenhouse Gas

Those who fear global warming blame any climate changes upon man's activity, including the raising of cattle for food. The digestive system of all ruminants, including cows, produce methane gas as part of the digestive process. Methane is considered one of the greenhouse gases that change the Earth's climate. Some have even suggested ways of limiting the methane produced by cows.

Ref: Science News, 1/14/06, p. 19, S. Perkins, "Greenhouse Plants" Photo: Cow- Pixabay.com.