Did you know... ? Did you know that the Earth atmosphere, also known as air, is a mixture of gases? And the main gas is nitrogen with a 79%, oxygen is only about a 20% and the other 1% is a mixture of other gases like water vapour, argon and carbon dioxide. The human and animals need only the oxygen to live, only the 20% of the air and the other gases are useless to the human body. It is also good to know that the air can be polluted by other gases such as ozone and carbon monoxide, smoke and ash, and is this pollution one of the causes of the global warming by causing the "greenhouse effect". What has to do this with the movie? ... Nothing but the movie is so bad that i thought that it would be better if I write about this.