1. pollution
One of the major sources is carbon monoxide which manly comes from automobiles, but also burning of fossil fuels, CFCs etc. ... People burn down forests and people burn fossil fuels, and CFCs from aerosols. ... Factories and transportation depend on huge amounts of fuel billions of tons of coal and oil are consumed around the world every year. When these fuels burn they introduce smoke and other, less visible, by-products into the atmosphere. ... Be careful not to spill fuel while filling up gas tank and to tighten your gas cap tightly. ...
- Word Count: 671
- Approx Pages: 3
- Grade Level: High School