What are the precautions for forest fire prevention? How is the global forest area changing?

According to the central location of forest fires, the speed of spread, the affected parts and the extent, forest fires can be roughly divided into three categories: surface fires, crown fires and underground fires. According to the affected forest area and the number of casualties, forest fires are divided into general forest fires, large forest fires, major forest fires and particularly major forest fires. So what are the precautions for forest fire prevention? How is the global forest area changing? Let's take a look at the introduction of Encyclopedia Knowledge Network!

Contents of this article

1. What are the precautions for forest fire prevention?

2. How is the global forest area changing?

3. How to calculate forest coverage rate?

What are the precautions for forest fire prevention?

You are not allowed to bring fire and flammable items into the mountains or forests. You are not allowed to smoke, light torches, have picnics, barbecue food, burn incense, or burn paper in the forest areas. You are not allowed to smelt mountains, burn wasteland, burn grass on field ridges, burn piles, etc. You are also not allowed to light fires in the wild to keep warm. You are not allowed to throw cigarette butts outside while riding in a vehicle.

Everyone should pay attention to fire prevention. They should learn more about fire escape knowledge to protect the safety of themselves and their families. They should also eliminate fire hazards at home to prevent fires.

It is prohibited to carry flammable and explosive items into public places or on public transportation. When entering public places, pay attention to fire signs and remember the evacuation direction.

If a fire occurs, call 119 immediately. Do not open doors and windows rashly when fighting the fire to avoid air convection and accelerate the spread of the fire.

How is the global forest area changing?

According to the United Nations Food and Agriculture Organization, 12 million hectares of forests disappear every year around the world. Although the area of ​​planted forests increased by 3 million hectares per year in the 1990s, the global forest area is still declining at a rate of 0.3% per year. The main reasons are deforestation and over-logging in tropical forests, as well as acid rain that causes large areas of forest to decline, making the forest land lose its ability to regenerate.

Forest area refers to the area of ​​forest land composed of arbor species with a canopy density of 0.2 or above (including 0.2) or forest belts with a crown width of more than 10 meters.

The forest area includes the area of ​​coniferous forests, broad-leaved forests, mixed coniferous and broad-leaved forests and bamboo forests of natural and artificial origins.

Forests cover about 9.4% of the Earth's total surface area, or about 4 billion hectares. Due to excessive logging by humans, global forest resources are rapidly decreasing.

How to calculate forest coverage

Forest coverage is the ratio of forest area to total land area. Different countries use different methods to calculate forest coverage. For example, China's forest coverage refers to the percentage of the total area of ​​arbor forests, bamboo forests, and shrub forests with a canopy density of 0.2 or above to the land area. Forest coverage is generally expressed as a percentage.

Forest coverage rate is an important indicator reflecting the actual level of forest resources and forest land in a country (or region).

Forest coverage rates in countries around the world: Japan 64%, South Korea 61%, Norway around 60%, Sweden 54%, and Brazil 50-60%.

Canada 44%, Germany 30%, the United States 33%, France 29%, India 23%, China 21.36%, Egypt 0%.

By the end of 2020, my country's forest coverage rate reached 23.04%, the comprehensive vegetation coverage of grasslands reached 56.1%, and the wetland protection rate reached more than 50%.