"Main Environmental Problems Facing Humanity" Environment and Development PPT Courseware

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"Main Environmental Problems Facing Humanity" Environment and Development PPT Courseware

Part One: Goal Setting

1. Use examples to understand the causes of environmental problems. (Regional cognition, man-land coordination view)

2. Be able to combine materials to analyze the environmental problems faced by different regions. (comprehensive thinking)

PPT on the main environmental problems faced by mankind, part 2: strong foundation and independent diagnosis

basic literacy

1. Environmental problems and their causes

1. Environmental issues are closely related to __________. In the process of interaction between humans and the environment, humans' different attitudes and behaviors towards the environment will produce different __________. Environmental problems are the result of humans adopting inappropriate and unfriendly attitudes and practices towards the environment.

2. Under normal circumstances, the natural environment has a certain ________ for human beings to reasonably and moderately demand. However, when human beings demand more from the environment than the environment ________, problems such as depletion of natural resources and __________ will occur.

3． The natural environment also plays a certain role in containing, decomposing and removing wastes discharged by humans. However, if the amount of waste that humans discharge into the environment exceeds the _________ of the environment itself, it will lead to a decline in environmental quality and cause __________ and other problems.

[Micro Thinking] Is it correct to say that renewable resources can be regenerated or recycled, and there will be no resource shortage and depletion problems?

Tip: Incorrect. Renewable resources are renewable under the premise that humans make reasonable use of natural resources. If the scale and intensity of human activities exceed the limits that the environment can bear, it will lead to various environmental problems. Therefore, human beings' unreasonable use of natural resources not only accelerates the depletion of resources, but also leads to environmental pollution and ecological damage.

2. Manifestations of environmental problems

1. With the growth of global population and economic development, human demand for resources is increasing day by day, and resource and environmental problems are becoming increasingly prominent. Currently, the main environmental problems faced by mankind and their manifestations are as follows:

2. The manifestations of environmental problems are different in cities and rural areas.

3. The manifestations of environmental problems vary in different countries.

4. The current environmental problems are becoming more and more serious.

[Micro Thinking] What are the differences and connections between environmental issues and natural disasters?

Tip: Both affect human production and life, and even endanger human survival. Among them, natural disasters are mainly caused by natural causes. Environmental problems in a broad sense include environmental problems caused by natural causes and environmental problems caused by man-made causes.

[Practice quiz]

True or false

(1) The root cause of environmental problems is unreasonable human activities. ()

(2) The haze that has appeared frequently in recent years is an environmental pollution problem. ()

(3) When sandstorms occur, the atmosphere is turbid and visibility is reduced, which is considered air pollution. ()

(4) Soil pollution only harms crops. ()

(5) Acid rain has become a global environmental problem. ()

PPT on the main environmental problems faced by mankind, the third part: analysis of problems and cooperative exploration

Explore the causes of environmental problems

Cape Helena is located at the southern tip of Chile. The strange thing is that almost all the animals there are blind. Hunters can easily pick up a blind hare and take it home to enjoy; most of the fish caught in the river are blind fish; blind wild birds often fly into the yards or rooms of local residents. , becomes a delicacy for people. The picture below shows the changes in the ozone hole over Antarctica.

[Problem exploration]

Analyze the causes of "blindness" in animals by combining graphic and text materials.

Tip: The area of ​​the ozone layer hole over Antarctica continues to expand, and strong ultraviolet rays are emitted to the surface, causing damage to surface organisms.

Explore and summarize

1. The mechanism of environmental problems

There are two reasons for environmental problems: first, the speed at which humans demand resources from the environment exceeds the regeneration speed of the resources themselves and their substitutes; second, the amount of waste discharged into the environment exceeds the self-purification capacity of the environment. As shown below:

2. Analysis of specific reasons

Environmental problems in today's world are mainly caused by human factors. The reasons are summarized as follows:

(1)Population pressure

(2) Unreasonable use of resources

(3) One-sided pursuit of economic growth

Solutions to environmental problems

(1) Types, manifestations and distribution of environmental problems. First, determine what the environmental problem is, what type it is (ecological damage or environmental pollution), its performance characteristics, distribution, etc. from the pictures, tables, texts and other information given in the question. Once you understand the types of environmental problems, it will be easier to connect them with the knowledge structure you have learned about environmental problems.

(2) Cause analysis. Environmental problems arise from natural causes and man-made causes. Generally speaking, the analysis should focus on human causes. Most environmental problems are caused by the irrational use of resources and energy, but natural causes should not be ignored. Clarifying the causes will help solve environmental problems.

Read the "diagram of the relationship between natural resources and human activities" and complete questions (1) to (2).

(1) The dotted box in the figure shows the fierce contradiction between human beings and natural resources, and its external manifestations are mainly ()

A． Destruction and shortage of resources B. Promote rapid economic development

C． New materials emerge at the historic moment D. The scope of resource utilization is getting wider and wider

(2) Human beings’ uncontrolled development and utilization of natural resources is mainly due to ()

A． Natural resources are renewable resources

B． Humans can develop and utilize natural resources unlimitedly

C． Rapid population growth and misconceptions

D． The types of natural resources used by humans continue to increase

Exploration 2: Manifestations of Environmental Problems

Tuotuo River is the name of a section of the source of Jinsha River, with a total length of 375 km. In imagination, it should be clear. When I saw it 20 years ago, it was indeed a clear river, as green as jade. However, now, after flowing for more than 50 kilometers, the glacier meltwater of the Tuotuo River has gradually become turbid, and the river water has a salt-alkali smell. When we reach the Tongtian River in the lower section, it is already rolling with turbid waves, just like the Yellow River. Due to the destruction of forests on both sides of the source, the surface of the land is exposed, causing the glaciers to retreat, the snow line to rise, the swamps to dry up, the meadows to degrade, and strong winds will blow sand and rocks, making the sky and earth dark.

——"Who will protect the mother river?" 》

[Problem exploration]

What environmental issues are described in the article?

Tips: Vegetation destruction, soil erosion, land salinization, land desertification, glacier shrinkage, etc.

Main environmental problems faced by mankind

1. Common resource depletion issues

2. Common types of ecological damage

3.Main environmental pollution problems

4. Problems arising from environmental pollution

PPT on the main environmental problems faced by mankind, the fourth part: improving ability and customs clearance training

1. Regarding the description of the causes of environmental problems, the correct statement is ()

A． It is produced by people's development and utilization of resources and environment

B． It is produced by people emitting waste and harmful substances during the production process

C． It is caused by people's development of resources and environment exceeding the carrying capacity of the environment, resulting in environmental damage and degradation.

D． is caused by people's heavy dependence on resources and the environment

Analysis: Environmental problems arise due to environmental damage or environmental degradation that occurs when humans over-exploit and utilize resources and the environment, thereby endangering the survival and development of humans and other organisms.

Answer: C

2. The environmental problem referred to by "danger" in the comics is ()

A． Water shortage b. global warming

C． Reduction in biodiversity D. Sandstorms

3． Which of the following statements is incorrect ()

A． This environmental problem is particularly prominent in arid and semi-arid areas

B． The man-made causes of this danger include deforestation, overgrazing, and overcultivation.

C． In addition to China, regions with serious environmental problems include North Africa, West Asia, the United States, and Australia.

D． To avoid worsening of this environmental problem, human development activities must be prohibited

Read the following poems and answer questions 4 to 6.

① Britain’s creepy soot clouds are coming... The city is like facing the Pope in the Middle Ages. (Norway·Ibsen)

②The fire shines on the sky and the earth, and the red stars are scattered with purple smoke. On a bright moonlit night in Nanlang, songs move Hanchuan. (Li Bai·"Qiupu Song") (Note: Qiupu is located in the west of Guichi District, Anhui Province today. It was one of the famous silver and copper producing areas in the Tang Dynasty)

③The wind roared on the September night in Luntai, and the gravel in the river was as big as a bucket, and the stones were scattered all over the ground in the wind. (Cen Shen·"Walking through the rivers to send Dr. Feng off for the Western Expedition")

④The north wind blows the white grass on the ground, and the sky is full of snow in August. (Cen Shen·"Bai Xuege Sends Judge Wu Back to the Capital")

4． The environmental problem described in the above poem is ecological destruction ()

A． ① B. ②

C． ③D. ④

5. The scenery described in the poem ① is consistent with which of the following pictures ()

A． A B. Second

C． C D.D

6. The environmental problems that the scene described in verse ② will not cause are ()

A． Vegetation destructionB. desertification

C． Soil erosion D. Acid rain

Analysis: Question 4: The United Kingdom and Norway are far apart from each other by the North Sea. Acidic gases such as SO2 in soot clouds can spread with the westerly wind and form acid rain; the smelting of non-ferrous metals such as silver and copper requires a large amount of coal and wood, producing a large amount of toxic gases and Solid waste; Verse ③ describes the desert landscape; Verse ④ describes the climate characteristics. Question 5, poem ① describes acid rain. Picture A represents water shortage, Picture B represents water pollution, Picture C represents deforestation and land reclamation, and Picture D represents acid rain. Question 6: Anhui is located in the monsoon zone in eastern my country, so land desertification will not occur.

Answer: 4.C　5.D　6.B

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Update Time: 2024-09-01

This template belongs to Geography courseware People's Education Press High School Geography Compulsory Course 2 industry PPT template

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