1) Is called green house effect to the consequences of te excesive being of several gases, which cause an increase in the global temperature,
2) Carbon dioxide, Methane, NItrous oxide.
3) The form a bigger layer of gases around our world
4) Cutting trees, using a lot of cars and building a lot of factories
5) Ozone layer
6) Skin cancer, eye cataract and sunburn
7) By using old refrigerators, air conditioners, fire extinguishers,spray can.
Well, there are a lot of thigs to do, for example start growing plants everywhere, an there is a recent invent which allows gathering all sort of gases emited from the factories which would help us to give those gases a correct treatment in order to stop pollution our environment