The following book review in the Moon

　　The sun is burning a huge fireball. Without light and heat from the sun, we can not survive on the planet Earth. The ozone layer around the planet to protect us from the fire of the sun damage. However, if the ozone layer break, be like?

　　Read the story below in the moon, I have a more deep sentiment: to protect the earth, we must first protect the ozone layer is not destroyed, reducing CFC emissions.

　　All life on Earth would be no life left the sunlight and the sun light is visible light, ultraviolet, infrared, three parts. Sunlight into the atmosphere （including UV）， 55% of light through the atmosphere to the earth and sea, of which 40% of visible light, which is the driving force for photosynthesis, green plants; 5% 100 —— 400 nm wavelength ultraviolet light, and ultraviolet divided into long wave, medium wave, short wave ultraviolet light, UVA can sterilization. But the wavelength of 200 —— 315 nm short-wave ultraviolet radiation on the human body and biological harmful. When it passes through the stratosphere, the most absorbed by the ozone layer.

　　However, in the fast advancement of human technology, a large discharge of sewage and toxic gases, heavy use of products containing CFCs, the ozone layer destruction. Imagine, if the "ozone layer" that destroyed the umbrella of the Earth, the Earth will happen?

　　How should we do to protect the ozone layer? We can drive less, use less products containing CFCs, no radiation of appliances to buy .

　　To our planet, please protect the ozone layer. Hope that through our efforts, not to expand empty, and even to restore the original appearance of the earth more beautiful, more human health and longevity!

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