Cows that have been genetically modified so they burp and fart less could have a major impact on climate change—potentially helping to reduce global warming by cutting methane emissions by half, scientists have said.
Methane is a greenhouse gas that is far more potent than carbon dioxide. It is released when biological material breaks down, such as during a cow’s digestive process. While the burning of fossil fuels is by far the biggest contributor to anthropogenic climate change, methane from the agriculture industry also has a role to play—and this mostly comes from cattle releasing the gas.
Previously, scientists have proposed different ways to reduce methane emissions from livestock, such as introducing dietary changes. However, this is unlikely to make a big difference in terms of climate change.
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Exposing the Big Game 
Can’t give up meat eating under any circumstances. Actually trying to genetically modify another living being so that you can imprison, kill and eat it is the stuff of horror movies or Grim(m’s) Fairy Tales in this case.
Of course, man and cattle have been the foundation of the human economy since ancient times – so that is the underlying reason.
we shoudl not be geneticallyy modified animals. would you like to be genetically modified yourself. it is ugly and inhumne