How will the composition of haze change as the proportion of coal burned in cities declines?

The smog will become less and less, and eventually it will be controlled by humans.

It will reduce some of the harmful substances, and the composition of haze will gradually reduce some of the harmful substances. , which is also beneficial for people.

It can greatly control the formation of haze.

The composition of the haze will gradually reduce some of the harmful substances.

The composition of the haze line will not change, but the quality of the haze will decrease.

It may reduce the formation of haze and make the air cleaner.

The fog will become more and the haze will gradually decrease.

It will reduce some of the harmful substances, and it is also beneficial to people.

Reducing the composition of some hazardous substances will gradually reduce some of the harmful substances.

25.X analysis: China's urban air pollution has always been soot pollution represented by soot and sulfur dioxide.

a. When using coal fire for heating in winter, insufficient coal combustion is easy to produce toxic carbon monoxide gas, which can poison people, so the choice is correct

b. Carbon dioxide is not toxic, so the option is wrong

c. When using coal fire for heating in winter, insufficient coal combustion is easy to produce toxic carbon monoxide gas, which poisons people, instead of sulfur dioxide, so the choice is wrong

d. When using coal fire for heating in winter, insufficient coal combustion is easy to produce toxic carbon monoxide gas, which poisons people, rather than hydrocarbons, so the choice is wrong

Therefore, a

Answer] A Answer Analysis] Test Question Analysis: The cause of air pollution is: the combustion of coal can produce sulfur dioxide, nitrogen dioxide and other polluting gases; Emissions of many polluting exhaust gases produced by industry; and its vehicle exhaust emissions. Therefore, a

Test Focus: Knowledge of environmental protection.

Dust pollution, chemical pollution (not right, do not spray).

China's main fuel is coal, so in the past 10 years, China's urban air pollution has always been soot-type pollution represented by dust and sulfur dioxide

So the answer is: dust; Sulfur dioxide

Answer: Brother Hui's case A city is polluted by soot mainly because of the harmful gases emitted by coal burning from factories and household stoves in the city, and due to the increase in heating equipment such as homes and offices in northern China in winter, the harmful gases emitted have increased correspondingly, and the pollution of the Zen god has been aggravated.

The haze weather is mainly caused by the extensive development mode, the unreasonable industrial structure and energy structure, and the root cause is still in fossil energy, one is burning coal, the other is fuel oil, and the other is relatively extensive in the development mode, emitting a large number of pollutants. On September 10, 2013, the "Air Pollution Prevention and Control Action Plan" has been issued, which is the "10 articles of the atmosphere" in the society. We have adopted 35 measures to divide the tasks into key areas and units.

I believe that with the further implementation of the "10 Atmospheric Measures", in 5-10 years, in accordance with the requirements of the "10 Atmospheric Articles", the situation of air pollution will be improved. In fact, the ultimate goal of taking so many measures is to solve the problem of air quality improvement, the first is to reduce coal, the second is to control the car, the car control is actually to reduce the consumption of oil resistance of the stone bucket, the third is to reduce dust, if these measures are implemented in place, the air quality will be improved.