"Main Environmental Problems Facing Humanity" Man-land Relationship and Sustainable Development PPT

Description

"Main Environmental Problems Facing Humanity" Man-land Relationship and Sustainable Development PPT

Part One: Learning Objectives

1. Give examples of common environmental problems in life.

2. Use data to summarize the main environmental problems faced by mankind.

PPT on the main environmental problems faced by mankind, part 2: 01 Sort out the teaching materials and lay a solid foundation

1. Concepts and types of environmental problems

1. Concept: The environmental quality ________ or ecological ________ caused by __________ or human activities acting on the environment around people, and this change in turn has an adverse impact on human production and life.

2. Classification: According to the nature, it can be divided into environmental pollution, ecological damage and resource shortage.

3. Causes

(1) Human development and utilization of the environment are becoming more and more intense, and the damage to the environment is becoming more and more serious.

(2) More and more waste and harmful substances are discharged, exceeding the _________ of the environment.

(3) With the rapid growth of global ________ and the rapid development of ________, the demand for resources is increasing day by day.

2. Main environmental issues

1.Shortage of resources

(1) Cause: Humans have long-term large-scale exploitation and destruction; predatory development has wasted a large amount of precious resources.

(2) Performance: The quantity and quality of certain _________ on the earth have declined sharply; the amount of resources per capita has been greatly reduced.

(3) Consequences: It is difficult to meet and protect human needs for resources.

2. Ecological damage

(1) Causes: Humanity’s large-scale social production activities, long-term deforestation and grassland reclamation, etc.

(2) Consequences: biological _________ has been severely damaged, ecological imbalance has aggravated soil erosion, land desertification and ecological deterioration.

3. Environmental pollution

(1) Concept: refers to the phenomenon that harmful substances are produced in the process of human production and life, causing environmental quality _________, endangering human beings _________, and affecting the normal survival and development of living things.

(2)Pollution type

PPT on the main environmental problems faced by mankind, the third part: 02 Key points of inquiry: Improving literacy

Exploration Point 1: Concepts and Types of Environmental Problems

Inquiry guide

The figure below is a schematic diagram of the relationship between humans and the environment. Picture stories answer the following questions.

1. Arrows A and B in the figure represent the two main causes of environmental problems:

A means ____________________________________________________________,

B stands for ________________________________________________________________________.

2. The meanings of arrows C and D in the figure are:

C represents the feedback effect of the _______ system, and D represents the impact of human activities on _______.

3. The main types of environmental problems include ecological damage, __________ and __________.

4. Fill in the serial numbers of the following options on the horizontal lines A to D (the meanings of which are the same as the arrows in the picture):

① Indiscriminate mining and abuse of mineral resources ② Smoke and dust generated by fuel oil ③ Industrial "three wastes" emissions ④ Excessive extraction of groundwater ⑤ Transformation of local climate through greening ⑥ Acid rain ⑦ Water conservancy projects ⑧ Environmental protection

A.______; B.______; C.______; D.________.

Core summary

1. Causes and manifestations of environmental problems

2. Differences in environmental issues

(1) Different regions face different environmental problems

(2) Environmental problems manifest differently in different countries

Track training

1. Read the materials and answer the questions.

Human beings, as the masters of the earth, have had a close relationship with the surrounding geographical environment from the day they were born. On the one hand, human life and production activities need to continuously obtain materials and energy from the surrounding environment for their own survival and development. At the same time, they discharge waste into the geographical environment. There is a gap between humans and the environment. A special relationship that is both opposite and unified. For thousands of years, human society has developed in this relationship of unity of opposites. The picture on the right shows a schematic diagram of the relationship between humans and the environment.

(1) What types of environmental problems will occur when humans obtain matter and energy from the environment? How did it come about?

Answer: Resource shortage and ecological destruction. When humans demand resources from the environment faster than the regeneration speed of the resources themselves and their substitutes, problems such as resource shortages and ecological damage will occur.

(2) What types of environmental problems will occur during the discharge of waste from human production and life into the environment? How did it come about?

Answer: Environmental pollution. Environmental pollution problems will occur if the amount of waste discharged by humans into the environment exceeds the self-purification capacity of the environment.

Research point 2: Main environmental problems faced by human beings

Inquiry guide

Below is a regional map of China. Picture stories answer the following questions.

1. The outstanding ecological and environmental problems in the area indicated by the diagonal line in A are _____________. The main natural causes of this ecological and environmental problem are __________________, and the main man-made causes are _______________________.

2. The terrain area where C is located is __________. The environmental problems caused by air pollution in large cities in this terrain area are mainly ________. The climate conditions causing this environmental problem are ____________. The characteristics of the local energy structure are_ ___________.

3. The biggest resource and environmental problem facing the life and production of cities 1 to 8 in the figure is _______________, and the main natural cause of its formation is ____________________________________________________________

____________________________.

4. Since the energy structure of cities A to F in the figure is dominated by ________, with long heating periods in winter and heavy industry concentration, environmental pollution is most prominent with ________ pollution.

Core summary

Main environmental problems faced by mankind

(1) Ecological damage

(2)Environmental pollution

(3)Shortage of resources

PPT on the main environmental problems faced by mankind, part 4 content: 03 in-class drill knowledge implementation

Read "Schematic diagram of the relationship between environment, resources and population" and answer questions 1 to 2.

1.The meanings of the letters F and H in the picture are

①F represents resource acquisition; ②F represents production activities; ③H represents

Waste emissions ④H represents domestic consumption

A.①③ B.②③

C.①④ D.②④

2. Problems that may arise in stage E are:

① Over-development leads to the destruction of renewable resources; ② Excessive discharge of pollutants exceeds the self-purification capacity of the environment

③ Arbitrary discharge of industrial and agricultural pollutants during production ④ Resource exploitation leading to environmental pollution and ecological damage

A.①② B.②③ C.②④ D.①④

Read the comic "Misfortune Comes from the Mouth" and complete questions 3 to 4.

3. The main environmental issues reflected in this cartoon are

A. Excessive reclamation and soil erosion

B. Overgrazing and pasture degradation

C. Deforestation, global warming

D. Forest destruction and land desertification

4. The following measures can help alleviate this problem:

① Ecological migration ② Return farmland to lakes ③ Expand irrigation ④ Ban on wood cutting and harvesting

A.①② B.②③ C.③④ D.①④

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Update Time: 2024-10-20

This template belongs to Geography courseware Hunan Education Edition High School Geography Compulsory Course II industry PPT template

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