[marcosdumay]

What is different is that urea requires a power source that creates more CO2 than the chemical process uses. So you will certainly (as long as you are using fossil fuels) have a source available.

Those things I mentioned buy their CO2 on the market. I have no idea where it comes from.

[noselasd]

Urea production requires ammonia, and the production of ammonia produces co2 in large quantities. It's not without reason the two are almost always loacted closely

[markcyffka]

Great point & not so often talked about. Something like 230Mton of CO2 are used each year, a little more than half goes straight to urea production. By contrast only about 10% goes to the food/bev, medical, and other applications we are more familiar with on a day-to-day basis.

plot showing the breakdown with some gov't sources. --> https://www.iea.org/reports/putting-co2-to-use