Several species of trees are used to illustrate the environmental functions of plants such as vacuum

1. Ivy, figs, Penglai bananas and common aloe vera can not only deal with bacteria and other harmful substances brought back from the outdoors, but can even absorb dust that is difficult for even a vacuum cleaner to suck up.

2. Orchids, osmanthus, plum, taro, red-backed cinnamon, etc. are natural dust collectors, and their cilia can intercept and absorb floating particles and smoke in the air. But the plant that absorbs the most dust is oleander. Because other flowers absorb dust, branches, and harmful gases, it will affect their growth.

3. Oleander has the ability to resist smoke, dust, poisons, purify the air and protect the environment. The leaves of oleander have a strong resistance to harmful gases such as sulfur dioxide, carbon dioxide, hydrogen fluoride, and chlorine. It was determined that the potted oleander was only slightly damaged at a distance of 40 meters from the pollution source, while it was basically harmless at 170 meters and could still bloom normally, and the sulfur content of the leaf tablets was more than 7 times higher than that of the unpolluted ones.

Even if the oleander is covered with dust, it can still grow vigorously, and is known as the "environmental guardian".

I think it's mainly in the following aspects.

First of all, large trees can protect against wind and reduce wind speed, so that larger particles in the air will settle.

The second function is that the leaves of the trees also have a certain adsorption effect on dust, which also helps to clean the air.

The third function is that trees are also a kind of cover for the surface, so it can minimize the dust on the ground from being affected by strong winds, thus raising dust and dust.

Masson pine: commonly known as a cluster tree, it is an evergreen tree of the pine family, up to 20 30 meters high, with a tower-shaped crown and a beautiful posture. The leaves are slender and long like long needles and are numerous, and the pine resin secreted by needles and trunks is easy to be oxidized to release low concentrations of ozone, which can freshen the air and treat tuberculosis.

The patient's ** has an auxiliary effect. Low concentrations of ozone enter the water and kill bacteria. Masson pine has strong dust-proof and dust-absorbing ability, and an adult pine can absorb a large amount of dust every year.

Cypress: It belongs to the cypress family, also known as weeping cypress and fragrant cypress, which is an evergreen tree with a height of up to 15 20 meters. It has a dense canopy, verdant and elegant, and is a good ornamental tree species for greening in urban courtyards.

It can absorb toxic and harmful gases such as sulfur dioxide and chlorine in the atmosphere, and is suitable for planting in oil refineries, pharmaceutical factories, chemical fiber factories, plastic factories and other factories to help purify the air in the plant area. Ginkgo biloba: also known as the ginkgo tree.

It is a deciduous tree of the Ginkgo family, which is an excellent tree species with special products in China and one of the world's five famous ornamental trees. It prefers deep and fertile, well-drained acidic soil, neutral soil and calcareous soil, has strong resistance to smoke and dust, and has the ability to absorb toxic gases such as sulfur dioxide, and is suitable for street trees and garden trees. Chinese acacia.

It is a deciduous tree of the legume family, which can be more than 20 30 meters high, with a straight trunk, dense branches, and green shade. The pinnate compound leaves are 27 cm long and bloom yellow and white flowers in July and August. Branches and leaves can resist a variety of harmful gases such as sulfur dioxide.

Its leaves also secrete fungicide, which kills bacteria within a certain range. Robinia pseudoacacia: belongs to the legume family, also known as acacia; deciduous tree with thorns on its branches; The leaves are pinnately compound and ovate.

It is resistant to sulfur dioxide, chlorine, photochemical smog, etc., and has a strong ability to absorb lead vapor. It is easy to trap dust, and the adsorption of dust per square meter of leaves can reach 6 7 grams. Stinky Tsubaki:

It belongs to the bitter wood family, deciduous trees, the leaves are singular pinnate compound leaves, incubated-lanceolate, and there is a foul smell after rubbing. The tree has strong resistance to toxic and harmful gases such as sulfur dioxide, nitrogen dioxide, and chlorine, and can be used as an excellent tree species for air purification in areas with serious air pollution. Elm:

It is a deciduous tree of the elm family, up to 30 meters high, with dark brown bark, small thick and hard leaves, round fruits like money, drooping branches, and clinging to willows. The tree species is very adaptable, hardy, drought-resistant, barren-resistant, and can resist sulfur dioxide, chlorine, fluorine and other toxic gases and insect smoke. The surface of elm leaves is rough, the dust retention ability is strong, and the adsorption of dust per square meter of leaves can reach more than 10 grams.

Construct a tree. It belongs to the mulberry family, also known as false bayberry and rotten cloth tree. Deciduous tree, dioecious. The tree is emitting sulfur dioxide and hydrogen sulfide.

Chlorine pollution sources are planted 20 50 m downwind; Able to grow normally. It is also resistant to acids and can be used as a pioneer greening tree species in factories with serious air pollution. The female plant of the tree is prone to attracting flies when the fruit is ripe.

It is better to choose male plants. Neem tree: also known as neem, is a deciduous tree of the neem family, up to 30 meters high.

The tree is not only resistant to the absorption of toxic and harmful gases such as sulfur dioxide and hydrogen fluoride, but also an insecticidal expert, which can control 12 serious agricultural pests and is known as a pollution-free plant insecticide. The seeds, flowers, leaves, and bark of the tree can be used as medicine. It is suitable for planting street trees in courtyards, parks or highways and streets.

<> must first be able to survive pollution in order to absorb pollutants.

One, come to the spider plant:

A pot of spider plants is equivalent to one piece of air in a room of 8 to 10 square meters.

The purifier can effectively absorb formaldehyde, carbon monoxide and other toxic chemicals in the air. It can kill 80% of the harmful substances in the room and absorb 86% of the formaldehyde within 24 hours;

2. Saxiwei orchid (including foliage plants with huge leaves such as one-leaf orchid):

It can be called the "pollution control expert" of the room. A pot of saxifera can absorb more than 80 kinds of harmful gases in a room of about 10 square meters, and two pots of saxifera can completely purify the indoor air in the general room. Saxiviera can also release large amounts of oxygen during the day.

3. Aloe vera: The flower proverb says, "Spider plant aloe vera is a strong hand, and formaldehyde is so scared that it hides away." "Under the condition of 24-hour lighting, 90% of formaldehyde contained in 1 cubic meter of air can be eliminated.

Fourth, Ivy:

A pot of ivy destroys 90% of benzene in a room of 8 to 10 square meters, can deal with bacteria and other harmful substances brought back from the outside, and can even absorb dust that is difficult for even a vacuum cleaner to suck.

There are a lot of clean air, I haven't heard of vacuuming, and there are also pothos, spider plants, cacti, etc.

2 kinds of plants are most suitable for indoor cultivation, which is eye-catching and can purify the air, and novices can also raise them well.

Trees and all green plants have a certain absorption capacity for sulfur dioxide. As long as the sulfur dioxide in the air is kept at a certain limit, the leaves of the trees will not be harmed, and they can continue to absorb it, which has a purifying effect on the air. Pinus tabuliformis and Taxus tabuliformis have a strong ability to absorb sulfur dioxide.

Plants that can absorb hydrogen fluoride from the air are: Silver birch, poplar, jujube, camellia, blue press, mulberry, weeping willow, etc. Robinia pseudoacacia, silver birch and willow also have a strong ability to absorb chloride.

【Answer】D [Answer Analysis] Test Question Analysis: Forest can prevent wind and sand fixation, stop soil erosion, wind blowing, it uses the canopy of the tree body to block the way, reduce the wind speed, the fluff on the leaves, the secretion of mucus and oil, etc., has a strong adsorption and filtration effect on dust particles, each hectare of forest can adsorb 50 80 tons of dust per year, the dust content of the air in the urban green belt is generally less than half of the non-green belt, and the dusty leaves can be quickly recovered to block the dust after being washed by rain, so choose D.

Test Center: This question examines the significance of protecting vegetation.