The conversation between human and AI assistant.
If CO2 is a natural coolant, then why and how does it contribute to global warming?
Are there any natural sources of CO2 besides trees and other plants?
Yes, there are many natural sources of CO2, such as volcanic activity, ocean release, and animal respiration. However, it's important to note that while these sources do contribute to the overall level of CO2 in the atmosphere, it is human activity that has caused the rapid increase in CO2 levels in recent years.