What are the three major aspects of air pollution?

Industry. Stoves and heating boilers.

Transportation.

There are many types of air pollution, and more than 100 kinds of harmful ones have been found, and air pollutants can be divided into the following according to different chemical and physical properties

1. Reduced pollution: It often occurs in areas where coal and oil are mainly used, and the main pollutants are sulfur dioxide, carbon monoxide and particulate matter.

2. Oxidative pollution: automobile exhaust pollution and the photochemical pollution it produces.

3. Petroleum-based pollution: mainly from automobile emissions, petroleum smelting and petrochemical plant emissions, including nitrogen dioxide, olefins, alkanes, alcohols, etc.

4. Other special pollution: mainly various chemical substances discharged from various industrial enterprises.

The main cause of air pollution.

1. Residents' awareness of environmental protection is weak.

The atmospheric environment is the environment on which human beings live, and because the damage to the atmospheric environment is irreversible, it is more expensive to control air pollution than to take effective measures to prevent and control air pollution. In order to promote rapid economic development, the local government often does not consider the size of the atmospheric environment capacity when formulating economic policies, industrial policies and urban planning and construction, only pays attention to short-term interests, and lacks long-term development planning.

2. Unreasonable energy utilization and serious waste.

The main cause of urban air pollution is the serious energy waste caused by the unreasonable energy consumption structure and utilization and low utilization rate in China.

3. Insufficient investment in air pollution prevention and control.

One of the reasons for China's serious environmental pollution is that there are too many historical debts, and the state has not invested enough in environmental protection, clean energy implementation, pollution emission and control for a long time. At present, China's investment in environmental pollution prevention and control is less than 1% of its GDP, which is seriously out of step with China's economic development.

4. Law enforcement is not strict, and supervision and management are insufficient.

Although China has made great progress in the construction of air pollution prevention and control regulations and standards, the phenomenon of non-observance of existing laws, lax law enforcement, and impunity for violating the law is still quite serious. In order to develop the economy, the local government intervened in the law enforcement of the environmental protection department, and opened the back door to some new unreasonable layout and construction projects with excessive pollution. The responsibilities of the supervision and law enforcement departments are not clear, the supervision is not effective, and the pollution supervision and management force is still very weak.

5. Lack of feasible and practical governance technologies.

In recent years, China has done a lot of work in the promotion, research and development and use of air pollution prevention and control technologies and equipment, but the gap with the demand for air pollution control is still very large, and it is far from meeting the requirements for pollution control. There is a lack of cost-effective treatment technology, which directly affects the process and effect of urban air pollution control.

Air pollution, also known as air pollution, according to the definition of the International Organization for Standardization (ISO), generally refers to the phenomenon that certain substances enter the atmosphere due to human activities or natural processes, present sufficient concentrations, reach sufficient time, and thus endanger human comfort, health and welfare or the environment.

1) Industry: Industrial production is an important part of air pollution. There are many types of pollutants emitted into the atmosphere by industrial production, including soot, sulfur oxides, nitrogen oxides, organic compounds, halides, carbon compounds, etc. Some of them are soot, and some are gases.

2) Stoves and heating boilers: A large number of civil stoves and heating boilers in the city need to consume a large amount of coal, and the coal will release a large amount of dust, sulfur dioxide, carbon monoxide, and other harmful substances to pollute the atmosphere during the combustion process. Especially in winter, when heating, it often fills the polluted area with smoke and chokes people's cough, which is also a source of pollution that cannot be ignored.

3) Transportation: Automobiles, trains, airplanes, and ships are the main means of transportation in contemporary times, and the exhaust gases produced by burning coal or oil are also important pollutants. In particular, the number of cars in the city is large and concentrated, and the pollutants emitted by the exhaust can directly invade people's respiratory organs, which is very serious to the air pollution in the city, and has become one of the main sources of air pollution in large cities.

The exhaust gases emitted by automobiles mainly include carbon monoxide, sulfur dioxide, nitrogen oxides and hydrocarbons, and the first three substances are very harmful.

4) Smoke from forest fires.

Air pollutants include particulate matter, sulfur oxides, carbon oxides, nitrogen oxides, hydrocarbons and other harmful substances.

1. Particulate matter: also known as dust, refers to liquid and solid substances in the atmosphere. Particulate matter can be divided into primary particulate matter and secondary particulate matter, which are a variety of solid particles that are uniformly dispersed in an aerosol system.

2. Sulfur oxide: is a general term for oxide. Including sulfur dioxide, sulfur trioxide, sulfur trioxide, sulfur monoxide, etc.

3. Carbon oxides: mainly including carbon dioxide and carbon monoxide. Carbon has c, oxygen has o can make up 7 different types of carbon monoxide and carbon dioxide.

4. Nitrogen oxides: It is a general term for the oxidation of nitrogen. Including nitrous oxide, nitric oxide, nitrogen dioxide, nitrous oxide, etc.

5. Hydrocarbons: Compounds formed by carbon and hydrogen. Including methane, ethane and other hydrocarbon gases.

6. Other harmful substances: such as heavy metals, fluorine gases, etc. Heavy metals include lead, mercury, cadmium, chromium, arsenic, thallium, antimony, nickel, copper, zinc and other pollutants.

The phenomena of air pollution are:

1. Radiation contamination. It refers to the appearance of radioactive substances or rays that exceed national standards on the surface or inside of materials, human bodies, places, and environmental media caused by human activities.

2. Water pollution. The reason for the formation is that the chemical, physical, biological or radioactive pollution of the water body is caused by the intervention of a certain substance, which leads to the change of its chemical, physical, biological or radioactive pollution, thereby affecting the effective use of water, endangering human health or destroying the ecological environment, resulting in the deterioration of water quality.

3. Air pollution. The reason for the formation is that the concentration of pollutants in the air reaches or exceeds the harmful level, resulting in the destruction of the ecosystem and the normal survival and development of human beings, and causing harm to people and organisms. Mainly carbon monoxide and hydrogen sulfide emitted from factories, automobiles, power plants, etc.

4. Noise pollution. The causes include traffic noise, noise from motor vehicles, ships, subways, trains, airplanes, etc. Industrial noise: Noise generated by various equipment in factories.

We usually see the most air pollution, phenomenon. It turned out to be mainly smoke coming from the chimney inside the factory. resulting in air pollution.

Now it is. Some cars emit exhaust fumes. Of course, there are other vehicles such as motorcycles.

Of course, there are also some exhaust gases emitted from factories, which cause air pollution, which is the most common. Then there are the peasants, burning the straw left in the fields.

Air pollution is a complex phenomenon, and the concentration of air pollutants at a given time and place is affected by many factors. Anthropogenic pollutant emissions from stationary and mobile pollution sources are one of the most important factors affecting air quality, including exhaust from vehicles, ships, and aircraft, production emissions from industrial enterprises, residential life and heating, and waste incineration. Urban development density, topography and meteorology are also important factors affecting air quality Nitrogen oxides include nitric oxide and nitrogen dioxide, nitrogen dioxide is transformed by nitric oxide through ozone oxidation, nitric oxide itself is harmless, but nitrogen dioxide will cause damage to the human respiratory system and blood, nitrogen oxides are mostly produced in coal combustion and automobile exhaust, with the increase of vehicles, the content of nitrogen oxides in the air also comes more.

Hello: Waste gas is mainly nitrogen oxides, hydrocarbons, sulfides, ammonia, hydrogen sulfide, volatile organic compounds (VOCs), etc., pollution is more complex, pollutant components are complex, widely produced, in most industrial production will be generated, especially in the chemical industry, pharmaceutical industry, printing industry, coating industry, materials, food, equipment, daily necessities and other processing and manufacturing industries, there will be waste gas production, especially VOCs organic waste gas!

Air pollution, also known as air pollution, refers to the phenomenon that certain substances enter the atmosphere due to human activities or natural processes, present sufficient concentrations for a sufficient period of time, and thus endanger the comfort, health and welfare of the human body or the environment. That is, the air contains one or more pollutants, the amount, nature and duration of which can harm the lives of humans, plants and animals, damage property, or interfere with the comfortable living environment, such as the presence of odors. In short, as long as the quantity, nature and time of a substance are sufficient to affect human beings or other living beings or property, we can call it an air pollutant.

In other words, air pollution occurs when certain substances increase abnormally in the air.

There are many types of air pollutants, and they can be solid particles, droplets or gases, or a mixture of these forms. What are the types of air pollutants currently defined by laws and regulations in China? Depend on.

Air pollutant.

According to the Air Pollution Control Act and related regulations, air pollutants can be divided into four major items.

Gaseous pollutants.

Including sulfur oxides, carbon monoxide, nitrogen oxides, hydrocarbons, chlorine, hydrogen gasification, fluoride, chlorinated hydrocarbons, etc.

Including suspended particles, soot, black smoke, acid mist, dust, etc.

Secondary pollutants.

It refers to the pollution produced by photochemical reaction of pollutants in the air, including photochemical fog, photochemical high oxide, etc.

Foul-smelling substances. Including chlorine, hydrogen sulfide, methyl sulfide, mercaptans, methylamines, etc.

Common air pollutants include particulate matter, carbon monoxide, sulphur oxides, nitrogen oxides and hydrocarbons, most of which are caused by human factors. In China's laws and regulations, most of the air pollutants produced by human factors (such as chimney emissions, vehicle emissions, etc.) have emission standards to regulate their emissions.

Indoor pollution. Indoor Air Pollution Survey Report.

What are the common pollutants in interior decoration? What are the potential hazards to people? How can some prevention and control measures be taken? Let's take a closer look.

Common contaminants and their hazards.

There are more than 500 kinds of volatile substances in indoor air, including more than 20 carcinogens and more than 200 pathogenic viruses. The main hazards are: formaldehyde, benzene, ammonia and trichloroethylene.

However, indoor air pollution is mainly in decoration pollution, and the reason is that the building materials selected in the building contain harmful substances, and seriously exceed the standard. In the decoration of new homes, benzene, formaldehyde, ammonia, radon, total volatile organic compounds and other harmful substances are common pollutants, mainly from various coatings, adhesives, artificial floors, wallpapers, floor tiles, paints and other decoration and decoration materials.

1. Exhaust gas: Vehicles, ships and airplanes and other means of transportation do bring convenience to people's lives, but they are also one of the most important causes of air pollution.

2. Use of fossil fuels: Factories, businesses, offices, and homes all use fossil fuels and coal to generate electricity or heat. However, their direct emissions can cause serious pollution to the air. It is also harmful to plants and reduces oxygen production.

3. Production of oil: Oil is the driving force of vehicles, but this useful substance is one of the main contributors to global air pollution. Burning oil releases substances such as carbon dioxide and nitrogen oxides into the air, which can cause illness if inhaled into toxic gases such as nitric oxide.

4. Mining: Human activities such as mining and transportation are also one of the main causes of air pollution. These activities release carbon monoxide, sulfur dioxide, and nitrogen oxides into the atmosphere, which can lead to smog and various health problems.

5. Industrial production: In the process of producing products, paper mills, steel mills, metallurgical plants, cement plants, asphalt plants and other factories will emit some air pollutants into the atmosphere, such as sulfur oxides and hydrogen sulfide.

6. Pesticides or insecticides: When sprayed with pesticides, it can be fatal to birds and even aquatic residents. And it will cause a certain amount of pollution to the air.

In addition to this, there are nuclear power plants - radioactive materials, indoor pollution (spray paint, building materials, etc.) can pollute the air, which in turn affects the health of people and animals.