A 350-word article on smog and air pollution

Haze is a combination of fog and haze. Due to the deterioration of air quality, the phenomenon of cloudy weather has increased and become dangerous.

The harm is getting more and more serious.

In many areas of China, haze weather phenomenon is combined with fog as an early warning and forecast of disastrous weather. unite

It is called "haze weather".

Haze, as its name implies, is fog and haze. But fog is fog, haze is haze, and there is a big difference between fog and haze.

Sulfur dioxide,

Nitrogen oxides and inhalable particles are the main components of smog, and the first two are gaseous.

Contaminants,

The last kind of particulate matter is the chief culprit that aggravates smog weather pollution. They are combined with fog.

Together,

Let the sky turn gray instantly.

The English abbreviation of particulate matter is

pm，

What Beijing monitors is

pm2.5，

That is, the diameter is smaller than

10

Micron particles of pollutants. This particle itself is both a pollutant and heavy.

Carriers of toxic substances such as metals and polycyclic aromatic hydrocarbons.

Sources of toxic particulate matter in cities: such as automobile exhaust; Waste produced by burning coal for heating in winter in northern China; worker

Exhaust gas from industrial production and so on.

With the deterioration of air quality, the phenomenon of cloudy weather has increased and the harm has increased. Many parts of China.

Hazy weather phenomena are combined with fog as a warning and forecast of disastrous weather. Collectively referred to as "haze weather". in fact

Fog and haze are quite different in some ways. For example, when fog appears, the air is humid; Haze space-time

The gas is relatively dry, and the relative humidity of the air is usually in the range of

Under 60%. The reason for its formation is due to a large number of tiny

Dust particles, smoke particles, salt particles, etc. Floating evenly in the air, so that the effective horizontal visibility is less than.

10 km

Air mixing

The phenomenon of erosion. The symbol is "∞". The diurnal variation of haze is generally not obvious. When the air mass changes little, the air

When the group is stable, it will last for a long time, sometimes.

10

More than a few days. Due to haze, light fog, sand

Weather phenomena such as sandstorm, sand blowing, floating dust and smoke are all caused by a large number of extremely fine dust particles or smoke floating in the air.

Particles and other effects make the effective level visibility less than.

10 km. Sometimes it is difficult for meteorological professionals to tell the difference. must

A comprehensive analysis must be made based on weather background, sky conditions, air humidity, color and smell, satellite monitoring and other factors.

Only through judgment can we draw a correct conclusion, and sometimes the weather phenomena of fog and haze can be transformed into each other.

Haze is harmful to the human body after being inhaled into the human respiratory tract, and serious inhalation for a long time will lead to death.

of course，

Facing this terrible natural weather, we also need some self-protection.

Open the window less in foggy days;

For example:

Wear a mask when going out; Drink more Erythrina and Platycodon grandiflorum tea; Appropriate supplementation of vitamin d; A light diet and plenty of water can do all this.

Effectively resist the invasion of smog.