I think Global warming is caused by people wanting to be warm so they turn up their heaters, and build fires all over the world. Also with several billion people and evven more animals giving off excessive amounts of body heat. All this heat enters the atmosphere and the atmosphere heats up...........we should have negative population and animal growth. Remove all heaters and fireplaces from homes and outdoors. No more cooking food the heat from cooking also enters the atmosphere multiplied by billions.....well you get the picture.