Question

what is global warming caused by

Answer 1

the increase in the amount of carbondioxide in the atmosphere cause global warming

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.