✔ 最佳答案
The dirty main origin cause of formation of roof beam of air can be roughly divided into naturally for the sake of two kinds with people:
Natural air pollution :
Volcanism.
Come from the desert district or lack the sand blown by the wind that the vegetation area blows.
Come from poisonous gas that animal discharge, such as ox in methane gas discharged after the plant of finishing digesting piece.
Mountain fire and smoke caused.
People for air pollution(usually burn it cause with fuel,and this may cause by various kinds of activity not the following):
Dust and sand or chemical residue caused at the time of the animal husbandry
General industrial activity
Use the automobile of the internal-combustion engine
Burn coal or a case of pollution that causes of charcoal
Paint or other volatility solvent
Pollutant
The pollutant of the air can be divided into pollution gas and suspended substance.
The common pollution gas includes:
Can mix the acid gas of acid rain into with water , such as the sulfur dioxide, nitrogen oxide, even the carbon dioxide is calculated;
Can absorb the heat that the earth send out , cause the gas of the greenhouse effects, such as the carbon dioxide;
To the poisonous gas of human body, for instance carbon monoxide and hydrocarbon ,etc..
Ozone in the troposphere of the air. (Note: The ozone in the above troposphere, if it is stratospheric, will not spread ; If in the ionosphere, can prevent ultraviolet ray and other strong one from the sun from penetrating , benefit environment instead. )