A cow emission produces methane and a lot of it. Methane is made up of 4 hydrogen molecules and 1 carbon molecule, as you can see in the diagram below this text.
Methane is very bad for the environment because there are little links that connect the carbon molecules to the hydrogen molecules. These links store heat VERY well and after a while those links can break and send their heat into the atmosphere. Now our DACs will take all the emissions and run them through a filter. Then, the methane which at this point is mostly purified, will be infused with water and then sent through a pipeline system. It will then be separated from the water and after that will be completely normal natural gas, much like propane.