Briefly about the fight against CO2 emissions

Briefly about the fight against CO2 emissions
Eco-cows from Romania, poor animals who no longer need to eat with their mouths, because everything they need is immediately thrown into their stomachs. Moreover, digested food does not reach the intestines; food is placed in the stomach for a certain time, and then taken out of the stomach.
This way, food can be introduced directly into the stomach and all waste can be eliminated before it reaches the intestines, reducing the CO2 factor.

Do you think this is where we should start to combat CO2 emissions? Are cows the main source?