Global warming has been a product of the "greenhouse
effect," a rapid increase of greenhouse gases. This is directly related to human activity, specifically, the fuel economy.
Since the industrial revolution, we have been pumping harmful gases,
such as aerosols and factory emissions, into the air and have been damaging the ozone. Air pollution also damages our respiratory
systems causing diseases such as bronchitis. And because of deforestation, we are destroying the trees, which provide us with
clean and usable oxygen.
Marine life, which is also a large part our foods supply, has been
devastated. From oil spills to garbage dumping, we have poisoned a large part of the marine ecosystem, causing the extinction
of many species.
Garbage and other debris clogs the land and promotes disease in
humans, plants and animals.