One cow releases 500 liters of Methane which is very harmful to the planet. Methane is more toxic than the Carbon Dioxide. After the digestion, cows releases methane which is the most among any livestock.
According to the United Nations Food and Agriculture Organization, Animals produce more greenhouse gasses and contributes almost 15% to the greenhouse effect.
Animals release more greenhouse gasses than all the cars and airplanes combined.
Cows living near the sea could be fed with Red Seaweed which drastically reduces the toxicity of the gas. According to a research, Cows who ate Red Seaweed releases up to 99% of less gas in comparison to other cows who eats fodder.