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世界 地球日
The earth is the common home of mankind, but human activity has caused serious damage to the earth. The biological survival of forests, lakes, wetlands are disappearing at an alarming rate; non renewable energy of coal, petroleum, natural gas and other face depletion due to over exploitation; a large number of greenhouse gas combustion emissions causing global warming, caused by the polar ice caps melt, sea level rise problems threatening the survival of mankind development. Protect the earth's resources and environment, the pursuit of sustainable development model is urgent.
There are 6000000 hectares of farmland, 9000000 hectares per year in the pastoral areas of lost productivity.
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界 地球日
World Earth Day
世界 地球日
世界地球日（World Earth Day，4月22日） 世界地球
This year of April 22nd is
the forty-second world earth day. This year's Earth
日即每年的4月22日，是一项世界性的环境保护活动。
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世界 地球日
：The ten global environmental problems
1.Global warming Because of global warming, will have varying effects on the global, high temperature can make the polar ice melting, sea level will
rise every 10 years 6 cm, thus will cause some
coastal areas were flooded. Global warming may also affect the variation of rainfall and atmospheric circulation, the climate anomalies,
rain also caused soil
acidification, the destruction of soil nutrients, the soil leannessrops, endanger the forest growth. In addition, acid rain corrosion of building materials
Day theme: "cherish the
earth's resources development mode
change".
China's theme is: "treat the earth - the scientific development and constructing the harmonious".
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; to human skin cancer incidence; damage the eyes, causing cataracts Ershi blind;
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。
3.The reduction of biological diversity
Scholars estimate, the world each year there are at least 50000 species extinction of species extinction, a daily average of up to 140, 13 14
世界 地球日
4.Acid rain spread
Acid rain falls to the rivers, lakes, will prevent the water fish, shrimp growth, so that the fish reduced or disappeared; acid
easy to cause the disasters of flood .
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世界 地球日
2.Loss and damage the ozone layer
Destruction of the ozone layer, will make the ground by
the increase of the UV radiation
5.Forest reduction
Caused the species reduction and soil erosion, reduce further aggravates the greenhouse effect of CO2 absorption.
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世界 地球日
nd desertification