Green Arbor Day Manuscript, Green Arbor Day Manuscript Picture Collection

handwritten newspaper of Green Arbor Day, complete picture of handwritten newspaper of Green Arbor Day

1. Significance of Arbor Day

Afforestation can not only green and beautify homes, but also play a role in expanding forest resources, preventing soil erosion, protecting farmland, regulating climate and promoting economic development, which is a grand project beneficial to the present and future generations. In order to protect forestry resources, beautify the environment and maintain ecological balance, many countries in the world have set up Arbor Day according to their actual conditions. With people's increasing awareness of environmental protection and active participation in afforestation activities, our living environment will be continuously improved.

Some scholars abroad have calculated the ecological value of trees: a 5-year-old tree generates oxygen worth about $31,2; Absorbing toxic gases and preventing air pollution is worth about $62,5; Increase the soil fertility value by about $31,2; Water conservation is worth $37,5; Providing breeding grounds for birds and other animals is worth $31,25; Resulting in protein worth $2,5. Excluding the value of flowers, fruits and wood, the total value is about $196,.

whether this calculation is accurate or not is obvious in terms of the practical value of trees.

a tree can produce 2 kilograms of pulp, and if these pulps are to produce toilet paper, there must be at least 75 rolls of toilet paper weighing 1 grams.

In cities, a tree can store pollutants emitted by a car driving for 16 kilometers a year. Many trees can absorb harmful gases. For example, one hectare of Cryptomeria fortunei forest can absorb 6 kilograms of sulfur dioxide every day, and others, such as Ailanthus altissima, oleander, ginkgo biloba and phoenix tree, all have the function of absorbing sulfur dioxide. When the urban green area reaches more than 5%, the pollutants in the atmosphere can be effectively controlled.

Arbor Day handwritten newspaper pictures Urban forests can increase air humidity. An adult tree can evaporate 4 kilograms of water a day, so the air humidity in the forest increases obviously. According to calculation, for every 1% increase in urban green area, the local summer temperature can be reduced by .1 degrees Celsius.

Urban forest belts and hedges can reduce noise. A forest belt with a width of 3 meters can reduce the noise by 6-8 decibels.

There are 3.5 bacteria per cubic meter of air in forest areas, while there are 34, in densely populated cities lacking greening. Urban streets with trees contain about 8% less germs than urban streets without trees.

Urban shelterbelt can slow down the wind speed, and its effective range is less than 4 times of the tree height, with the best effect in the range of 1-2 times, which can reduce the wind speed by 5%.

In farmland forest network, it can usually slow down the wind speed by 3-4%, increase the relative humidity by 5-15% and increase the soil water content by 1-2%. As long as there are 1 cm thick litter on the surface, the surface runoff can be reduced to less than .1/4 of the bare land, and the sediment can be reduced to less than 7% of the bare land.

compared with bare land, a hectare of woodland can store at least 3 cubic meters more water. The water storage capacity of 1, mu of forest is equivalent to a reservoir with a water storage capacity of 1 million cubic meters, and the construction of such a reservoir requires an investment of more than 1 million yuan.

some experts predict that if forests are lost on the earth, about 4.5 million biological species will disappear, 9% of fresh water on land will flow into the sea in vain, and human beings will face serious water shortage. The loss of forests increases the wind speed by 6%-8% in many areas, and hundreds of millions of people will be killed by the wind disaster ... < P > Second, the origin of Arbor Day < P > March 12th is our own Arbor Day, and it is also the anniversary of Sun Yat-sen's death. During his lifetime, Dr. Sun Yat-sen attached great importance to forestry construction. When he was the interim president of the Republic of China, he set up the Ministry of Agriculture and Forestry, with the Mountain Forest Department in charge of national forestry administrative affairs. In November 1914, the first "Forest Law" in China's modern history was promulgated, and in July 1915, the government stipulated that the annual "Tomb-Sweeping Day" would be designated as Arbor Day.

in February, 1979, the 6th meeting of the 5th the National People's Congress Standing Committee (NPCSC) adopted a resolution to designate March 12th as China's Arbor Day. The significance of this resolution is to mobilize people of all ethnic groups in China to actively plant trees and speed up the greening of the motherland and various forestry construction. The date of Dr. Sun Yat-sen's death is designated as Arbor Day in China, which is also to commemorate Dr. Sun Yat-sen's great achievements and symbolize that his unfulfilled wishes will be realized in new China and will be better realized.

Third, the slogan of Arbor Day

1. Say goodbye to the hustle and bustle of the city and embrace green.

2. Greening the environment and beautifying life. Arbor Day slogan

3. Life lies in green, and hope lies in green.

4, Arbor Day, give the earth some color, let's move together!

5. On Arbor Day, you should also contribute to make the earth grow beautiful hair!

6. plant trees and green the motherland!

7. into the badlands has green mountains and green waters.

8. People without disasters raise trees, while trees with disasters raise people.

9. Afforestation is beneficial, and planting trees is rich.

1. Rich at the moment, pick dirt; Rich in the long run, plant more trees.

11. The predecessors planted trees, while the descendants enjoyed the cool.

12, more green leaves, more warmth.

13. If you want a cornucopia, the barren hills will become green forests.

14. Keep trees and cover barren hills, and don't worry about food and clothing.

15. There are no trees on the mountain, so the crops can't be saved.

16. There are thousands of poplars in the village, so you don't need to beat firewood.

17. vigorously plant trees and prohibit indiscriminate logging.

18. Afforestation is beneficial for today, and its contribution will be in the future.

19. Water is the source of life, and trees are the guardians of water.

2, more care, more care, starting from me, care for every grass and tree in the scenic spot.