Why do large industrial cities produce photochemical pollution?

Photochemical smog is mainly caused by automobile exhaust and industrial exhaust emissions, and the olefins hydrocarbons and nitrogen dioxide (NO2) in automobile exhaust are emitted into the atmosphere, and under the strong sunlight ultraviolet radiation, they will absorb the energy possessed by sunlight. The molecules of these substances, after absorbing the energy of sunlight, become unstable, and the original chemical chain is destroyed, forming new substances. This chemical reaction is called a photochemical reaction, and its product is a highly toxic photochemical smog.

The reason is due to the participation of light.

Because large industrial cities have developed heavy industry, there will be many pollutants such as nitrogen dioxide that cause photochemical pollution.

Because large industrial cities are full of commercial factories, factories have a lot of garbage and exhaust gases discharged at will, and there are many cars, and olefins, hydrocarbons and nitrogen dioxide (NO2) in car exhaust are toxic substances.

Because there are more chemical plants in big cities, pollution is serious.

caused by vehicle exhaust and industrial exhaust emissions in large industrial cities.

Because the exhaust emissions of large industrial cities are too large.

Because there are many factories in large industrial cities.

Big industrial cities have a lot of factories and produce a lot of industrial waste gases.

Because large cities have a large demand for industrial production, they are prone to light pollution.

There is too much glass, too much can reflect light.

Photochemical pollution does not refer to light pollution, but to the pollution caused by photochemical smog caused by nitrogen oxides.

Nitrogen oxides (NOx) mainly refer to nitric oxide and nitrogen dioxide. Both NO2 and NO2 are gases that are harmful to the human body. Nitrogen oxides and hydrocarbons (HC) are irradiated by strong solar ultraviolet rays in the atmosphere to produce a new secondary pollutant - photochemical smog, in this complex photochemical reaction process, mainly produce photochemical oxidants (mainly ozone) and other complex compounds, collectively referred to as photochemical smog.

Studies have shown that photochemical smog can occur in some large cities between 60 degrees north latitude and 60 degrees south latitude. Photochemical smog mainly occurs in the summer and autumn seasons when the sun is strong, such as noon or afternoon on a sunny summer day with low humidity and a temperature of 24 to 32 degrees.

With the continuous progress of the photochemical reaction, the reaction products continue to accumulate, and the concentration of photochemical smoke continues to increase, reaching the maximum value after about 3 hours and 4 hours. This photochemical smog can drift hundreds of kilometers with air currents, damaging rural crops far from cities.

As for why it is called chemical pollution, it is because of the pollution caused by a chemical reaction.

The essence of photochemical pollution is that some chemical substances enter the atmospheric environment, and under certain conditions, under the influence of light (that is, sunlight), the chemical reaction of two substances or their own state changes, resulting in new substances with great toxicity and negative impact on human society.

Photochemical pollution is first and foremost a part of air pollution, and air pollution is part of environmental pollution.

Yes! Environmental pollution includes water, atmosphere, soil, optics, radiation, etc. Photochemistry falls under the category of atmospheric pollution.

Of course, it is environmental pollution, but it will only be paid attention to in the past few years, and it may not be paid attention to for a certain period of time in the future.

Answer; It is not environmental pollution, but air pollution.

It is usually caused by retrospective nitrogen oxides.

Nitrogen oxides (NOx) mainly refer to NO, and NO2 are both gases that are harmful to human bush mimics. Nitrogen oxides and hydrocarbons (HC) are irradiated by strong solar ultraviolet rays in the atmosphere to produce a new secondary pollutant --- photochemical smog, in which photochemical oxidants (mainly O3) and other complex compounds are mainly generated, collectively referred to as photochemical smog.

NONO2 is unstable when under normal conditions.

Lightning can be used to convert N2.

It can be used as a good fertilizer for plants.

So. When after the rain.

Vegetation. Grow luxuriantly. While. no

No2 overdose.

It can easily cause acid rain.

Thereby. Harmful to plants.

Cause: Automobile exhaust chemical plant exhaust emissions.

Control: Improving technology.

It reduces the NOx in the exhaust of the car.

Exhaust gas should be treated before discharge.

Solution: There is no complete way to solve it.