FILE PHOTO: A dairy cow is seen at the South Mountain Creamery farm in Middletown, Maryland U.S., May 19, 2020. REUTERS/ Carlos Barria/File Photo
(Reuters) - Scientists have worked for years to reduce methane emissions from cattle burps by changing what cattle eat, or through research on vaccines, genetic modification of cattle and even forehead-mounted masks and backpacks to trap vapors.
WHAT IS THE PROBLEM?
