1. Our Ozone
... ozone stable enough for the planet to prosper. The levels are extremely important to every specie on the earth. Scientists discovered in the 1970's that chemicals that we had been using regularly were damaging the earth's protective layer. This damage has caused a "hole" that lets in the harmful rays of the sun. It's now up the people who caused the problem ... ...
- Word Count: 1083
- Approx Pages: 4
- Grade Level: High School