It's a fact that CO2 helps our air retain the sun's heat. This is known as the Greenhouse Effect, a normal aspect of Earth's climate for thousands of years.
But many people fear rising CO2 levels are increasing the Greenhouse Effect to cause Global Warming.
And since we're still seeing some record low temperatures worldwide, the term "Global Warming" has now been replaced with "Climate Change". Environmentalists cite lower temperatures and record snowfalls as evidence of Climate Change, to be blamed on our CO2 emissions ! This is sheer Greenhouse Madness !