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At present, ten environmental problems that threaten human survival is:
(a) global warming
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(two) loss and the destruction of the ozone layer
concentration of ozone gas 90% of the earth's stratosphere from the earth's surface in the 10~50 km, in from the ground 25 km maximum ozone concentration, forming a layer of ozone concentration with thickness of about 3 mm, known as the ozone layer. It can absorb the sun's ultraviolet radiation,[url=http://michaelkorshandbagsoutlet2013.weebly.com/]michael kors handbags outlet[/url], to protect life on earth from excessive ultraviolet radiation damage, and the energy stored in the upper atmosphere, play a role in regulating climate. However, ozone is a very fragile atmosphere, if access to some of the ozone destroying gases, they will and ozone chemistry, ozone layer would be destroyed. Destruction of the ozone layer, the ground will increase by the UV radiation intensity, which bring great harm to life on earth. Research shows that, ultraviolet radiation damage of biological proteins and genetic material DNA, causing cell death; the increased incidence of human skin cancer; damage the eyes, causing cataracts Ershi blind; suppression plants such as soybeans, melons, vegetables and so on growth, and the penetration depth of 10 meters of water, kills plankton and microorganisms, source thus endangering the aquatic food chain and free oxygen, affect the ecological balance and water self purification capacity.
(three) reduction of biological diversity
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