This is how I think global warming happens.
Nature is a balance of all things, one being fire. When the sun creates to much heat, things dry out, forest fires start, fires create soot which blocks the sun and cools the land. When the Earth cools, the dust eventually settles, the sun comes back slowly and causes new trees to grow on the burnt land. When man interferes with nature by putting out the fires,they are responsible for global warming. One 10,000 acre forest fire puts more carbon in the air than all the cars in America do in a month. By burning all the forests and scrub land in California we could balance and counter balance any global warming from autos for the next hundred years!