Forest fire prevention composition! 600 words urgent, ......................... urgent.

Everyone is responsible for forest fire prevention.

Forest is the cradle of human birth and the cornerstone of human existence. Protecting forests means protecting human beings. A single spark can start a prairie fire of ten thousand mu of forest. Not in wild fire, but also to promote the knowledge of forest fire prevention to parents and the masses. According to the laws of our country, it is forbidden to use fire in the wild in forest areas during the fire prevention period, and the necessary production fire must be approved by the county-level people's government or the units authorized by the county-level people's government. Don't use fire in dry, windy, high temperature and low air humidity. If you must use fire, light it from the top of the slope and let the fire burn from the uphill to the downhill, which is safer.

Let's remember: forest fire prevention should start from me!

The earth was born about 4.5 billion years ago. Forests appeared about 300 million years ago. Humans were born about 3 million years ago. The ancestors of mankind were apes. They live in groups in the forest, live in trees, eat wild fruits and are covered with leaves. Everything depends on the forest. Later, after a long period of development and evolution, it became today's people. So the forest is the cradle of human birth.

Forests are the main body of green plants on the earth. The biomass of plants (organic matter accumulation) on the earth accounts for about 99% of the total biomass of the earth, and forests account for more than 90% of the plant biomass.

Forests can increase precipitation and regulate climate. A tree is like an automatic water pump, an invisible fountain, which constantly absorbs groundwater, evaporates into the air through leaves, condenses into rainwater, and returns to the ground, carrying out a small biological cycle of water. A hectare of broad-leaved forest can transpiration 2400-8800 tons of water in a growing season, which is 20 times larger than the evaporation of the same area of land.

Forests can conserve water and prevent soil erosion. One mu of forest stores 20 tons more water than one mu of bare land, and the storage capacity of 50,000 mu of forest is equivalent to a reservoir with a storage capacity of 6,543.8+0,000 cubic meters. The 20 cm thick soil layer without forest land can be washed away in 46 years, while the 20 cm thick soil layer with forest land can be washed away in 570 thousand years at the longest.

Forests can prevent sandstorms and protect farmland. The desert is threatening the survival of mankind. The area of desertification land in China reaches 1560 square kilometers every year. Forests can stop the development of desertification.

Forests are the "air conditioners" of nature. When solar energy radiates to the canopy, 10%-25% is reflected to the sky, and 35%-50% is absorbed, which is converted into chemical energy through photosynthesis and stored in living organisms. The light penetrating into the forest is only 10%-20%, and the transpiration of leaves consumes a lot of heat energy, so the temperature in the forest is pleasant.

Forests are natural oxygen factories and consumers of carbon dioxide. A hectare of forest can absorb 1 1-30 tons of carbon dioxide every year, and produce 8-23 tons of oxygen, which is equivalent to the oxygen demand of 30-80 people.

The forest is a natural vacuum cleaner, which can retain 36.4 tons of dust per hectare of pine forest.

Forests are natural disinfectors and poison filters. Aromatic volatile substances secreted by forests can kill bacteria. Generally speaking, the content of bacteria in the air of forest areas is only one-eighth of that of shops in urban areas.

Forests are natural noise eliminators. A piece of forest can reduce the noise by 26-43 decibels (40-60 decibels will interfere with people's rest).

Therefore, the forest is the cornerstone of human existence. Without forests, human beings can't survive. Protecting forests means protecting human beings.

The original forest area on the earth reached 7.6 billion hectares, accounting for 5 1% of the land area. By 1995, the world forest area was only 3.45 billion hectares, accounting for 27% of the land area. Before the human belt appeared on the earth, there were forest fires. With the increase of population density on the earth, forest fires are becoming more and more serious, and the forest area burned by forest fires worldwide is about 6.5438+million hectares every year. Forest fires in China consume about 1 10,000 hectares of forest every year, which is one of the most serious countries in the world.

1987 The forest fire area in Daxinganling, China reached1330,000 hectares, including woodland11400,000 hectares, which burned down three towns, affected 10807 households and left 56,692 victims homeless, resulting in 2/kloc-0. In 2007, 9 people died in ningyuan county, Yongzhou City, Hunan Province, and 1 person was seriously injured.

It's time to control the forest fire. Primary and secondary school students are the future masters of the country and should contribute to forest fire prevention.

First of all, we should learn and master the basic knowledge of forest fire prevention. Forest burning needs combustible materials, certain weather conditions and fire sources. If all three are indispensable, forest fires will not happen. Forest garbage, weeds, shrubs and trees are all combustible. The more these substances in the forest, the greater the risk of forest fire. The meteorological conditions of forest fire are drought, strong wind, high temperature and low air humidity. The forest fire weather in our city mostly appears in winter and spring. The Municipal People's Government shall designate the fire prevention period according to the period most prone to fire. The fire prevention period in Zixing City is generally from September 1 day to April 30th of the following year. During the fire prevention period, it is forbidden to use fire in the wild in the forest area, and the necessary production fire must be approved by the Municipal People's Government or the unit authorized by the Municipal People's Government. Don't use fire in dry, windy, high temperature and low air humidity. Dry weather and dry things are the most likely to cause fires. Don't use fire in the wild around noon, because it is the time when the temperature is the highest and the air humidity is the least, and it is often the time when the wind is the strongest, so it is easy to catch fire. If you need to use fire in the wild, choose the weather and time. Pay attention to the daily forest fire weather forecast during the fire prevention period. First-class fire weather, no danger, combustible materials in the forest can not burn; Grade II, low risk, and the combustible materials in the forest are difficult to burn; Grade III, moderate danger, combustible materials in the forest are easy to burn; Grade 4, highly dangerous, combustible materials in the forest are easy to burn; Grade 5, extremely dangerous, and combustible materials in the forest are extremely flammable. Necessary outdoor use of fire during the fire prevention period should not be carried out in grade 4 or 5 fire weather. When it is necessary to use fire in the field during the fire prevention period, it should be ignited from the top of the slope, so that the fire can burn from the uphill to the downhill, which is safer and less likely to go off.

The fire source is the kindling that ignites the forest fire. Playing with fire in the wild, smoking, setting off fireworks and firecrackers, lighting a handle, superstitious burning paper, burning bees, burning miscellaneous crops, burning hard grass in the wild, and accumulating chemical fertilizers during the fire prevention period are the main fire sources. Be careful with fire and pay attention to fire safety.

Second, forest fire prevention should start from me. As long as people don't use fire in the wild during the fire prevention period, there will be no forest fire without fire source. When you see a forest fire, you should call the local township people's government, forest management station, administrative village and municipal forest fire prevention office (33222 19) or call 1 19. Remember that primary and secondary school students and minors can't take part in forest fire fighting, which is heartless and dangerous!