Relatively fixed, this is for humans and them.
The survival of animals and plants is very important.
Yes However, under special circumstances, air
The composition will also change. These changes
Some people are man-made and others are natural.
Man-made changes since modern times
Come, with the development of modern industry and
The surge in fuel consumption comes from all over the world.
Look, harmful gases are released into the air.
Smoke and dust changed the composition of the air.
Pollute the air. Discharge into the air
Among gas pollutants, the second one is more.
Carbon monoxide, sulfur dioxide, carbon monoxide,
Nitrogen dioxide, etc. These gases mainly come from
Combustion of fossil fuels (coal and oil)
Exhaust gas from combustion and factories. Our country
The country that burns the most coal in the world, air
Pollution is mainly caused by smoke and coal.
During the combustion process, a large amount of coal will be produced.
Smoke and sulfur dioxide cause air pollution.
Dyeing. In addition, factory exhaust and automobile exhaust
Gas is also an important factor of air pollution.
Reason. This change in air composition is very important.
Human beings are very harmful.
Due to the presence of carbon dioxide in the atmosphere
Sulfur and nitrogen oxides, these substances in
The troposphere passes through a series of atmospheres.
Photochemical reactions can produce sulfuric acid and nitrate.
Acid steam, while gaseous sulfuric acid and nitric acid
Soluble in clouds and raindrops, and then precipitation.
This process causes raindrops to fall, causing acidity.
Rainfall, which is a very harmful acid.
It is raining.
Polluted air enters the human body,
It can cause respiratory system, circulatory system and nervous system.
Unified disease, seriously damaging human health.
Kang. Effects of air pollution and acid rain on agriculture,
Losses caused by forest, fishery and animal husbandry production
The loss is more serious. Another change is natural.
It is a volatile substance in underground mineral deposits.
Escape to the atmosphere under natural conditions.
Caused by it. For example, mercury has many colors.
Metals and precious metal ores (such as copper, lead,
Zinc, gold, silver, molybdenum, etc. ).
Element, so the mercury mine is still related to it.
There may be mercury vapor above the sediment.
Qi exists. Because it spreads in the air.
Wide range, easier than direct prospecting.
It has been found that according to the content of mercury in the air
You can quickly find the distribution of deposits.
Location. In northern Nevada, USA
I found a place to bury people in this way.
The "# meter gold belt" hidden underground.
In fact, under natural conditions,
Mercury not only volatilizes and escapes into the atmosphere.
Go, other elements, such as fluorine, chlorine,
Bromine, iodine, sulfur, helium, hydrogen, etc. It will be big, too.
The distribution of qi varies with strength.
Change. It has been found that in many metal mines
Mineral deposits, such as porphyry copper deposits, pyrite, and even
Over some coal mines, sulfur dioxide
The content is twice as high as normal.
To six times.
China is currently preventing air pollution.
The main measures taken in dyeing are:
$) Reduce or prevent air pollutants
Emissions; (%) Vigorously carry out afforestation.
Activities, usually100000 hectares of broad-leaved forest can
Absorb $ NUMBER tons of carbon dioxide and release it
#&"Tons of oxygen; (") air pollution
Source treatment, waste gas post-treatment.
Can be discharged into the air.
In addition, due to natural reasons,
You can study the change of air composition
The change of air composition, exploratively
Go to the mine In a word, the change of air composition
We can't ignore change.