Humans add carbon to the atmosphere in many ways. For example: - Car emissions - Factories - Electric powerplants - Fires - Etc.
We as humans can reduce our carbon footprint by using more efficient ways of powering our lives by: - Using renewable energy sources - Turning off devices when not in use - Not keeping cars on idle - Etc.
If you drive your car less and don't carpool, you will reduce the amount of carbon dioxide in the atmosphere. Another thing is to stop the factories from producing as much carbon dioxide released into the atmosphere.
