1. Purify the air.

The "Research on the Regulatory Function and Technology of Forests on PM2.5 and Other Particulate Matter" recently released by Beijing Forestry University believes that forest vegetation can increase Beijing's secondary air quality blue sky by 15 days per year.

This project is a major national forestry public welfare project launched by the State Forestry Administration in January 2013.

According to Professor Yu Xinxiao, the leader of the project, through research covering the forest ecosystem positioning and observation station network in the capital area, it was found that the removal process of atmospheric particulate matter by vegetation mainly includes three methods: deposition, blockage and adsorption. The research distinguished different forest vegetation

The configuration mode controls the strength of PM2.5's ability to filter out tree species with strong dust retention capabilities such as cedar, whitebark pine, tabby pine, locust tree, and black locust.

2. Food and leisure.

Dense forests provide a large amount of wood, as well as fresh mushrooms, wild fruits and other ingredients.

People walk into the forest and wonder if there is a deer, wild boar or wolf hiding behind every tree.

The forest inspires a variety of emotions in people. You don’t need to watch horror movies, read ghost books, or listen to eerie sounds. The forest itself has countless stories.

Extended information: The troubles caused by forests to humans: Because forests can make people confused and unable to find their way home.

In the 18th century, green forest heroes roamed the forest, and bandits of all kinds were killing people and stealing goods in the forest.

It was not until the end of the 19th century, with the establishment of the German "Wandering Birds" Association, that urbanites tired of industrialization rediscovered the value of forests, and Germany became a country where people could roam freely in the woods.

In the mid-1980s, there was a collective panic: fear that all the Black Forest in Germany would die!

At that time, some biologists believed that a tree with an incomplete crown, even if it still had green leaves, was a dying tree.

Later investigations showed that the Black Forest was not dead, it was just a self-adjustment and adaptation to human and environmental changes.

The Germans were relieved.