文档介绍：Environmental protection
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教案l environment and damage; On the pollution and damage of environment must be prepared to comprehensive treatment, and to create suitable for human life and working environment.
The classification of environmental pollution
According to the environmental elements: air pollution, soil pollution, water pollution.
According to human activities: industrial pollution, urban pollution, agricultural pollution.
According to the the environmental pollution source points: chemical pollution, physical pollution, biological pollution, noise pollution, radioactive pollution and electromagnetic wave pollution, etc.
Air pollution
Soil pollution
Water pollution
Environmental pollution mainly has the following several aspects:
the factory waste of smoke, waste gas, waste water, waste residue and noise
people living out waste smoke, waste gas, noise, water, garbage
the traffic tools (all the fuel vehicles, ships, aircraft, etc) to discharge the waste gas and noise
a large number of the use of chemical fertilizers, pesticides, herbicides and other chemical after irrigation flow of water
mining waste water, waste residue
the machine noise, electromagnetic radiation, carbon dioxide pollution
Remember those truths!
Dead lake event in North America
The northeastern United States and southeastern Canada, industry the most developed area in the western hemisphere, to the emissions of sulfur dioxide in the atmosphere every year more than 2500 ten thousand tonnes. About million tons of gone with the wind by the United States to Canada, more than 100 ten thousand tons from Canada to the United States. Appeared in the seventy s, these areas are large SuanYuOu, acid rain, acid than a tomato juice, multiple floating dead fish pond, lake lakeside trees wither.
Dead lake event in North America
Remember those truths!
Cadillac's ship
On March 16, 1978,