Pollution not only causes global warming - it causes global dimming, which has already caused famine and mass loss of human life in Africa by affecting the African monsoon. Global dimming happens when particles in the air, emitted by burning fuel, block and actually reflect the sun's light. We can clean up the atmosphere by burning fuels more cleanly, but as we do that without reducing greenhouse gases, we only accelerate global warming. We MUST reduce our consumption of fossil fuels in order to save ourselves and leave an earth that will sustain our children. Watch this excellent documentary. It's only 50 minutes long.