"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 2

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"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 2

Orangutans' dependence on the ecological environment

Orangutans are very sensitive to logging, and when logging becomes more intensive, they disappear completely. Orangutans are currently on the verge of extinction as more and more forests are lost or converted to farmland.

Ancient humans’ dependence on the ecological environment

The Shuidonggou site records the historical testimony of ancient humans' reproduction and struggle with nature, and contains rich and precious prehistoric information. It shows people a picture of the survival of ancient humans 30,000 years ago. It is the only Paleolithic site in the Yellow River region in my country that has been officially excavated so far.

Explore population growth and its impact on the environment

Example 1: Environmental changes in Alxa, Inner Mongolia

Material 1: Alxa, located in western Inner Mongolia, is one of the major sandstorm areas. Historically, Alxa also had large rivers (the upper reaches of the Heihe River originate from the Qilian Mountains) and large lakes (the Juyan Sea flows into the Heihe River) with abundant water, rippling blue waves, and green splendens, tamarisk, and poplar euphratica.

Material 2: In recent decades, due to rapid population growth, deforestation, grassland reclamation and water resource utilization have had to intensify. There are more than 30 reservoirs along the Heihe River alone. The water storage capacity has greatly exceeded its flow. By 1992, the downstream The flow was completely cut off and the Juyan Sea dried up. Now two-thirds of the nearly 1,000 motor-driven wells have become dry wells, and most of the lush Populus euphratica forests and grasslands have been replaced by deserts.

Examples of human activities damaging the ecological environment

1. Excessive cultivation of wasteland

2. Over-exploitation and utilization of wild animals and plants

3. Over-exploitation of forests

Examples of human activities improving the ecological environment

1. Carry forward the tradition of “waste-free agriculture”

2. Restoration of Haloxylon ammodendron forest belt

3. Wheat straw grid sand pressing

4. Close mountains, ban grazing, and restore ecology

Selected Exercises

1. Multiple choice questions:

1. The following behaviors are all measures taken by people to solve certain environmental problems. Which measure is most likely to lead to the opposite effect? ( )

A. Make more effective insecticides and pesticides

B. Seeking better ways to control population

C. Use straw to produce biogas to solve the problem of fuel shortage in rural areas

D. Build nuclear power plants to reduce coal-fired power generation

2. Which of the following measures is not conducive to the sustainable development of forests ( )

A. Use natural enemies to eliminate pests

B. Absolutely prohibit logging

C. Construction of supporting water conservancy projects

D. Firewood forests can be established in necessary areas to solve the problem of burning firewood.

3. Which of the following statements is correct ( )

A. Introducing birds that are good at eating insects will definitely be beneficial to the local environment.

B. Rational development and utilization of natural resources is conducive to sustainable development

C. To control water pollution in Taihu Lake, all production activities that produce sewage around Taihu Lake should be stopped.

D. Ecosystems can always digest various pollutants on their own, and humans should not interfere.

4. Eutrophication of water bodies will cause ( )

A. Increase of aquatic plants B. Massive death of fish and shrimps

C. Rich in fish and shrimp food D. Clear water quality

5. Many trees have a good blocking and filtering effect on atmospheric dust. The reason is ( )

①The dense branches and leaves of the forest can slow down the wind speed.

②Some trees have hairs on their leaves or can secrete oily or sticky substances.

③Can absorb various toxic gases.

④Can secrete antibiotics.

⑤After being washed by rain, the dusty leaves can quickly recover to block the dust.

A. ①③⑤ B. ①②④

C. ②④⑤ D. ①②⑤

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"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 5:

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"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 4:

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"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 3:

"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 3 Preview 1. In order to control the population and improve the quality of the population, our country has determined the implementation of ___________ as a basic national policy. 2. The specific requirements for family planning in my country are___..

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Update Time: 2024-07-08

This template belongs to biology courseware People's Education Press seventh grade biology book volume 2 industry PPT template

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