STOCKHOLM, Sweden - A Swedish university has received 3.8 million kronor ($590,000) in research funds to measure the greenhouse gases released when cows belch.

About 20 cows will participate in the project run by the Swedish University for Agricultural Sciences in Uppsala, about 40 miles north of Stockholm, officials said Monday.

Cattle release methane, a greenhouse gas believed to contribute to global warming, when they digest their food. Researchers believe the level of methane released depends on the type of food the eat.

Project leader Jan Bertilsson said that the cows involved in the study will have different diets and wear a collar device measuring the methane level in the air around them.

The research will be funded by a grant from the government's Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning.