Global Warming has been increased by living organisms like animals and humans by many ways:
1) We burn fossil fuels, which is very bad for our Environment's health 2) Animals like cows & buffalo produces a lot of methane which causes Global Warming. 3) Animals cut a lot of trees for their products, so increase the amount of Carbon dioxide in the atmosphere, thus increases Global Warming. 4) We don't minimize our dependence on Non-renewable source of energy which 'causes a lot of pollution in the environment