|
Feb 22
2010
|
Global warming. The subject seems to be coming up a lot these days. Extreme weather events are becoming more common. Fertile land is morphing into desert. Each year seems hotter than the next. In fact, global mean temperatures increased significantly during the past century and scientists predict that they could climb 6o F - 11.5o F by 2100 with bigger increases in the North America.
What is the main culprit behind global warming? We are. Our overuse of carbon-based energy sources like coal, natural gas and oil contributes to the greenhouse gases that are warming our world. Each year humans collectively spew around 55 billion tonnes of greenhouse gases (CO2e) into the atmosphere. On average, Americans contribute about 20 tonnes per person to the tally. Twenty tonnes! The result is that the Earth’s paper thin layer of heat trapping gases is becoming too dense.













