Question

how global warming is caused?

Answer 1

global warming is cause because of the increase in temperature due to more air pollution by selfish human activities

Answer 2

Answer:

Due to excess use of vehicles, huge amount of toxic gases are released into the atmosphere. The gases emitting from factories also cause pollution. These gases go up into the atmosphere. They have made holes into the ozone layer. Ultraviolet rays of sun are coming to earth. They reach to the earth and cause global warming.