Both human activity and natural forces contribute to the levels of carbon dioxide in the atmosphere. Which of the following contributors is caused solely by human activity?

It's human burning fossil fuel and cutting trees bruh

Answer - One of which is burning of fossil fuel. Which is used in factories, car, trains etc. Also cutting down trees and forrest which will release tons of CO2 back into the atmosphere.

Reasoning - So yes these are the few reasons of humans contributing to the atmospheric skies and giving trouble to earth.