Because they attempt to take away CO2 that the plants/trees need, without Oxygen we will suffocate and die. The theory of CO2 trapping the Sun's heat is flaw. The Truth is: Heat got transferred into the atmosphere through the vibration of Oxygen & Nitrogen's Electrons because they touched the hot surface of your car engines, truck engines, airplane engines, power plant's etc.. Gore's Scientist did the test through "unnatural way" by pumping CO2 into his Green House and accused CO2 of trapping it when his Shelter was the one trapping the heat. We will pay the pay now and later two times. They wanted us to pay CO2 emissions so they can get rid of CO2. Then we will die of no Oxygen. What happened to their logic people? or do they have one? In Belgium, their roads are like a ghost town, not much vehicles on the road. Isn't this sad? How can human hang each other in this civilized age? How can people believe in such CO2 stupidity?