>>508191016
CO2 is a heavier molecule than O2.
Increasing the CO2 concentration in the atmosphere makes it denser.
Denser atmosphere traps more heat from the sun. Global warming.

Since the industrial revolution, we are taking C in form of coal, oil and, gas from the ground. We burn the C by adding O2 and release the C+O2 into the atmosphere.

Climate used to change over centuries, but now it’s years.