"Intensifying Environmental Problems" Let's Face Unprecedented Challenges Together PPT

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"Intensifying Environmental Problems" Let's Face Unprecedented Challenges Together PPT

Part One: The Origin and Evolution of Environmental Problems

1. The occurrence of environmental problems

2. Evolution of environmental issues

Human activities in prehistoric society were mainly based on hunting and gathering, which basically did not cause environmental problems. Even if certain environmental problems occurred, the natural environment could slowly recover on its own as human migration stopped and human activities ceased; in agricultural society, agricultural production was the basis. Mainly, the development of agriculture and animal husbandry. At this time, the destruction of forests and grasslands caused environmental problems such as soil erosion and desertification. The environmental problems at this time were mainly the destruction of land; in industrial society, the emergence of machines, the use of petrochemical fuels, water and land The construction of air traffic lines, the emergence of big cities, etc. These large-scale activities to transform nature have caused various environmental problems such as air pollution, water pollution, and soil pollution.

Increasing environmental problems PPT, part 2: manifestations of environmental problems

manifestations of environmental problems

Environmental issues

environmental pollution

Water pollution Air pollution Noise pollution Soil pollution

ecological damage

Water and soil erosion, forest destruction, grassland degradation, land desertification

Increasing environmental problems PPT, the third part: important global environmental problems and hazards

1. Globally important environmental issues

Global warming is a natural phenomenon. When people burn fossil fuels, such as oil, coal, etc., or cut down forests and burn them, a large amount of greenhouse gases such as carbon dioxide are produced. These greenhouse gases are highly transparent to visible light from solar radiation, and are not transparent to the visible light emitted by the earth. Long-wave radiation is highly absorptive and can strongly absorb infrared rays in ground radiation, causing the earth's temperature to rise, which is the greenhouse effect. When the greenhouse effect continues to accumulate, it leads to an imbalance in the energy absorbed and emitted by the earth-atmosphere system, and energy continues to accumulate in the earth-atmosphere system, causing the temperature to rise and causing global warming.

Global warming will redistribute global precipitation, melt glaciers and permafrost, and raise sea levels, which not only endangers the balance of natural ecosystems, but also threatens human survival.

think about it

What harm will acid rain cause to our ecological environment?

It pollutes rivers and lakes, leading to the death of fish and shrimp; acidifies soil, damaging farmland, leading to reduced crop yields; destroying forests, leading to death; and so on.

Increasing environmental problems PPT, part 4: Countries around the world work together to solve environmental problems

——Take the "Kyoto Protocol" as an example

On February 16, 2005, the "Kyoto Protocol" officially entered into force. This is the first time in human history that greenhouse gas emissions have been restricted by regulations. In order to help countries achieve their greenhouse gas emission reduction goals, the Protocol allows the following four emission reduction methods:

1. "Emissions trading" where emissions credits can be bought and sold between two developed countries. That is, a country that has difficulty completing its reduction tasks can spend money to buy excess credits from a country that has overfulfilled its tasks.

2. Calculate greenhouse gas emissions based on "net emissions", that is, deduct the amount of carbon dioxide absorbed by forests from the country's actual emissions.

3. Green development mechanisms can be adopted to encourage developed and developing countries to jointly reduce greenhouse gas emissions.

Fourth, a "group approach" can be adopted, that is, many countries within the EU can be regarded as a whole, and some countries can reduce emissions while others can increase emissions, so as to achieve overall emission reduction tasks.

Increasing environmental problems PPT, part 5: review the past and learn the new, test you

1. The following reflects my country’s resource situation of “small land and limited resources” ( )

A. The total amount is rich B. The per capita resource possession is small

C. Unbalanced distribution of resources D. Severe resource waste and losses

2. The wind energy, tidal energy and wave energy actively developed in Zhejiang do not belong to ( )

A. New energy B. Clean energy

C.Natural resources D.Non-renewable resources

3. The West-East Gas Transmission Project embodies my country’s important measures to solve the problem of natural resources ( )

A.Expand the development scope of resources

B. Efforts to develop new energy sources

C. Implement cross-regional allocation of natural resources

D. Vigorously save resources

4. From the perspective of resource utilization, the successful launch of my country’s manned spacecraft reflects ( )

A. "Open source"

B. Improve resource utilization

C.Improve living environment

D. Change the spatiotemporal distribution of resources

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For more information about the PPT courseware "Working Together to Face Unprecedented Challenges and Increasing Environmental Problems", please click the "Working Together to Face Unprecedented Challenges and Increasing Environmental Problems" PPT tag.

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Update Time: 2024-06-24

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