3 Questions for High School Geography

1. Benefits: Save landfill space, reduce soil and water pollution; Waste is reused, waste is turned into treasure, waste incineration can generate electricity, and incineration ashes can be used to make building materials.

Disadvantages: If the temperature of waste incineration is not high (below 800 degrees), a large amount of dioxins will be produced, which is a serious air pollutant and causes great harm to human health; Poor dust control may cause an increase in solid impurities in the air, and there is a lot of dust in the air!

I remember that there was a report on Southern Weekly. As for the pros and cons, who is big and who is small, let's analyze it specifically. Generally speaking, garbage incineration plants cannot be built in residential areas.

2. Indiscriminate felling in the upper reaches leads to soil erosion, and sediment accumulates in the middle and lower reaches of the river, raising the riverbed and forming an "above-ground river"! If you build a polluting heavy metal plant or mine minerals upstream, you will pollute an entire river! The upstream construction of a hydropower station can regulate the amount of water

3. Transitional reclamation should be in the agro-pastoral ecotone, or where the land is not suitable for farming, such as hills with steep slopes. Transitional cutting is naturally in forest areas, such as the northeast, southwest, and southeast forest areas; Overgrazing is clearly on grasslands, such as the grasslands ...... Inner Mongolia

4. Environmental self-purification performance: For example, air pollution is sometimes very serious, but the air will be fresher after the next rain! For example, the pollution of river outlets is the most severe, and the downstream pollution farther away from the outfall will gradually decrease; In addition, the migration of tropical rainforests, the forests destroyed by agriculture will also regrow after the land has been abandoned for many years, but the third is the self-healing of the environment, but it is about ......

PS: Your questions are not three, but four!

1. The disadvantages outweigh the advantages.

Cons: Air pollution, exacerbating global warming; Pros: Reduce solid waste and avoid soil and water pollution caused by common deep waste burial methods. The heat generated by combustion can be utilized.

However, now the problem of the atmosphere is serious and global.

2.destroying vegetation, causing frequent floods and increasing soil erosion; Pollutant discharge, affecting water quality.

3. Mainly in the arid and semi-arid areas of the northwest, that is, north of the Great Wall, the traditional animal husbandry area, irrigated agricultural area and oasis agricultural area.

4. The river water can be completely renewed in about 15 days, and some solid waste can be decomposed...

1. The pros outweigh the cons.

Pros: It both disposes of waste and generates energy.

Disadvantages: Causes air pollution.

2. The construction of reservoir dams will reduce the amount of runoff in the lower reaches of the river.

3. Over-reclamation: agricultural production in arid and semi-arid sandy soil areas, especially on the edge of sandy areas (northwest region, grassland reclamation). Over-logging: arid region of the Ordos region of Inner Mongolia. Overgrazing: the northwest of our country.

4. In the process of water circulation, the water is self-purifying. Atmospheric movement, diffusion of pollutants, and reduction of their concentrations are also manifestations of self-purification.