An Invonvenient Truth- Fact #5

Fact 5: It is projected that in less than 50 years there will be enough CO2 to kill the Earth.
Source 1: http://scienceandpublicpolicy.org/scarewatch/6_billion.html This source is by a group of Climate Research which makes it credible. The source says that CO2 levels will raise the overall degree fahreheit by 7. This will kill all but 1 billion of Earth's population over the next century (100 years..NOT LESS THAN 50). I agree with this article because it is credible and less than 50 years seems to short to kill Earth.
Source 2: http://www.co2science.org/articles/V5/N12/EDIT.php This source is from an encyclopedia so it is credible. It says that coral reef production decreased by 11% in 1880 and could reach 35% in 2100 (100 years..not 50 years). The coral production decreased due to increased CO2 production. I agree with this source because it is credible and I can infer that the Earth could be killed in the next 100 years (if no action is taken now) due to the continuation of CO2 production.
Source 3: http://www.environmentalgraffiti.com/sciencetech/carbon-dioxide-might-cause-deaths/670 This source was written by Mark Jacobson, a Civil and Environmental Engineering Professor at Stanford which makes it credible. It, too, says that Earth's population will die when temperatures rise due to CO2 levels rising due to global warming. It said this will occur over the next century (NOT LIMITED TO LESS THAN 50 YEARS). I agree with this article because it is credible and it's the third proof I've had to support that the Earth won't necessarily die in less than 50 years.