What are the causes of smog and how to control it?

In recent years, haze has become a very serious pollution problem in our country. This problem is often discussed by people, especially in many areas in the north, where severe pollution often occurs. As we all know, haze can cause great harm to human health, such as causing some respiratory diseases, affecting the health of the cardiovascular system and mental health, etc. The following is a detailed introduction to the causes of haze and how to control it.

Causes and treatment of smog:

The main reasons for the formation of haze are: first, the relative humidity of the air near the ground in these areas is relatively high, the ground is dusty, and the people and traffic on the ground stir up the dust; second, there is no obvious cold air activity, the wind is small, and the atmosphere is relatively stable. Due to the stagnation of air, tiny particles in the air gather and float in the air; third, the sky is clear and cloudless, which is conducive to radiation cooling at night, causing the air near the ground with relatively high humidity to be saturated and condensed to form fog. Fourth, automobile exhaust is the main pollutant emitted. In recent years, there are more and more cars in cities, and automobile exhaust emissions are a factor in smog; fifth, secondary pollution caused by factories; sixth, pollutants such as CO2 emitted for heating in winter.

Introduction to measures to control haze

1. Accelerate the adjustment of energy structure

Make great efforts to ensure the efficient and clean use of coal. Coal accounts for nearly 70% of the country's primary energy consumption, and this is unlikely to change significantly in the short term. Therefore, efficient and clean use of coal is of utmost priority; total coal consumption control must be implemented. All regions shall formulate implementation plans for the total amount of coal consumption, break down the total amount control targets and assign them to local governments, implement target responsibility management, increase assessment and supervision efforts, and accelerate the development of clean energy. Vigorously develop clean energy such as hydropower, conventional natural gas, unconventional natural gas (coalbed methane, shale gas), biomass energy, wind energy, solar energy, geothermal energy, etc., and increase imports of pipeline natural gas, LNG, etc.

Measures to control smog: The key is to solve the problem of coal burning pollution.

Second, the key is to solve the problem of coal combustion pollution

It is mandatory for all coal-fired power plants, coal-fired boilers and coal chemical plants to install desulfurization, denitrification and dust removal facilities. Based on the fact that most of the existing independent thermal power plants have already installed desulfurization facilities, all independent thermal power plants, self-built thermal power plants, coal-fired boilers and coal chemical plants will be further required to install desulfurization facilities as soon as possible. At the same time, all large-scale coal-fired power plants, coal-fired boilers and coal chemical plants will be required to install denitrification and dust removal facilities; accelerate the introduction of new pollutant emission standards for coal-fired facilities such as thermal power generation, coking, building materials, and coal-fired boilers, add pollutant emission indicators, and further tighten pollutant emission limits. At the same time, we will vigorously strengthen the inspection of pollutant emissions to ensure they meet standards through online monitoring.

3. Strengthening emission management in steel, oil refining, etc.

Strengthen supervision and inspection on compliance of major pollutant emissions in industries such as steel and oil refining. It is mandatory to accelerate the construction of environmental protection facilities such as desulfurization, denitrification and dust removal for major pollutant emission sources such as sintering machines in the steel industry, coal-fired/coke-fired boilers in the oil refining industry and catalytic cracking.

IV. Comprehensively implement the pollutant discharge permit system

Key enterprises that emit major pollutants such as sulfur dioxide, nitrogen oxides, industrial smoke and dust, and volatile organic compounds must apply for pollution discharge permits from the environmental protection department before 2016.