... only depleted it twenty percent. Some scientist stress this point to argue how holes in the ozone never really exist. They claim instead that the ozone only thins from its peak from time to time(Howard). Even this claim sounds like a natural phenomenon just like an ocean tide, perhaps. No one has revealed, in fact, any evidence that long term global ... scientists claim to have ozone measurements that support environmentalist ideas. At eleven year intervals, ozone in the upper atmosphere increase by five percent which suggest the influence of the sunspot cycle. (Ponte-30) Where scientis...

• Word Count: 4635
• Approx Pages: 19
• Grade Level: High School