Climate Change. http://www.youtube.com/watch?v=V1VYmpTikgw&feature=related. Temperature trends. We’ve seen a lot of record-breaking temperatures in the past decade. The average temperature across the world has risen by 0.76°C since 1880 (when detailed temperature data was first recorded).
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Unfortunately, every year contaminated water claims five million lives.
Net change in forest area, 2005-2010 (ha/year)
5. Air pollution.
6. Natural factors.
3. Oil: this is unearthed from deep wells in the earth. Oil is refined into all sorts of products, like gasoline.
4. Natural gas: these are combustible gases which burn cleaner than oil or coal. Mainly composed of methane (CH4). We also find ethane (C2H6) as well.
5. Nuclear: When a uranium atom breaks apart, it releases a lot of energy in the form of heat. This spins turbines to generate electricity.