Scientists have learned that the Earth is getting warmer overtime. Although many people argue that this change is cyclic, I think that this change is due to the pollution that humans are causing. Global warming is due to the fact that greenhouse gases (such as CO2)  are in the Earth’s atmosphere. These gases are destroying the Earth’s ozone layer, which kept us out of the intensity of the sun’s rays. Even if these are not causing global warming, these gases should be kept out of the Earth’s atmosphere as a precaution to what might be future consequences.

http://royalsociety.org/climate-change/?gclid=CIPGkqDF2K0CFQPf4AoduB3Bng

 http://www.edf.org/climate/climate-facts-dangers-and-what-you-can-do?ssss_src=GAdGWtest_12.2011_control&gclid=COCcwtfD2K0CFWgTNAod43Gylg

http://www.skepticalscience.com/how-do-we-know-co2-is-causing-warming.html

Mars is a planet in our solar system. It is made up of iron, making it red. It got the name Mars from the Roman God of War. Since mars is occasionally visible by the human eye, sightings of it have gone back as early as the ancient egyptians. 

http://nineplanets.org/mars.html

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