Global warming may drive about 1 quarter of land animals and plants to extinction by 2050. This is a remarkably devastating number of organisms. This means that about 1 million species will be gone, with an estimated of 10 million species in existence. Humans cause most of global warming whether they believe it or not. Greenhouse gases are changing the climate in the world, and melting Arctic ice at an alarming rate. Even though we drive our luxury cars that use 13 miles per gallon, we still seem to think we are not the ones causing this chaos. In fact, cars are doing most of the damage. Also, because of global warming, the temperature in different regions change, which then becomes unsuitable for the organisms that previously thrived there. That then leads to a mass extinction of species.