There is nothing we can do to stop global warming. Global temperatures go in trends... just look at some of the photos of glaciers from the early 1900's... many were smaller then than they are now! Those who cry "the sky is falling" are just looking at pictures from a different era, after the glaciers grew again. Just because they got big in the mid twentieth century doesn't mean we caused them to melt in the late twentieth century. Heck, a scientist in the late 1800's theorized about global warming, long before industry got huge. He even showed the glaciers in Greenland were melting, and this was well over 100 years ago.
As far as our contribution goes, it's negligible. One volcano eruption puts out more greenhouse gasses in one day than all of the automobiles combined, for the whole year. And that happens thousands of times every year. Anybody that thinks the tiny amount of polution we put out is the cause of global warming has one thing in mind, and real data isn't it.