The Arguments
Those who think global warming is a natural process say that the troposphere is not heating up because man-made greenhouse gases are not causing the planet to heat up.
For some people, the final nail in the coffin of human-produced greenhouse gas theories is the fact that carbon dioxide is produced in far larger quantities by many natural means: human emissions are miniscule in comparison. Volcanic emissions and carbon dioxide from animals, bacteria, decaying vegetation and the ocean outweigh our own production several times over.
