What I mean by entropy is that we burn fossil fuels (low entropy) and release CO2 into the atmosphere (high entropy), so it takes a lot more energy and effort to remove CO2 than simply not burning fossil fuels.
Clearly laws of physics work against us when we try to remove a relatively low concentration gas from a planet-wide system.
I finally understand why galactose (greek word for milk) is a component of lactose (latin word for milk). It’s milk all the way down.