How Polluted Is Your City?
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We all know that global warming is caused by greenhouse gases, largely carbon dioxide, that is emitted by everything ranging from home appliances and SUV's to the heating and lighting systems of office buildings. But since we don't see the gas, most of us simply shake our heads in dismay and then continue on with our bad habits. Now, researchers at Arizona State University are trying to change that.
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지금 학습 시작하기댓글 137개
- Kate Orange12년 이상THIS IS SO BORING!!!
- elliot12년 이상that was very interesting
- Anika12년 이상This seriously frightens me. - Orange
- nick b. orange12년 이상The USA leaves so much carbon dioxide!
- devin orange12년 이상dont get it confusing
- Grace orange12년 이상that's interesting, but somethings I didn't quite understand.
- brooks orange 12년 이상this is vary confusing
- Hannah12년 이상Thats interesting
- sona orange12년 이상that is really sad!
- Amanda orange 12년 이상It was interesting but very hard to follow and understand