"Analysis of the impact of human activities on the ecological environment" PPT courseware on the impact of human activities on the biosphere

Description

"Analysis of the impact of human activities on the ecological environment" PPT courseware on the impact of human activities on the biosphere

Human beings are also living creatures, and their impact on the biosphere is far greater than that of other living creatures. Why is this?

The same human beings, modern humans have a far greater impact on the biosphere than ancient humans. Why is this?

Think about it and discuss it:

Some people compare the earth to a "spaceship" in which humans are the passengers. Do you think this metaphor is appropriate? When taking a ship, when you feel that the air in the cabin is dirty, you can go to the deck to breathe fresh air; the garbage on the ship can be sent to a special place for disposal after the ship docks; the number of passengers on the ship will not increase to the point of overcrowding... Is this also true on the "spaceship" Earth? What else can you think of from this?

Very reasonable and appropriate. However, the "spaceship" of the Earth is different in that it has more and more passengers, cannot dock to unload garbage, and cannot be updated due to air pollution. Description----The impact of population growth and human activities on the environment.

Tutoring exercises

(1) Population growth trend

At the beginning of the 19th century, the world's total population reached 1 billion; by 1930, it increased to _____ billion; by 2005, it reached _____ billion; in 2011, it exceeded _____ billion.

Below is a set of data on my country's population in different years, and a column chart of my country's population growth.

discuss

1. When did my country’s population growth accelerate significantly? What are the possible reasons?

2. After the mid-20th century, when did my country’s population growth rate basically stabilize at a low level? Why?

3. What is the actual situation of population growth where you live? Combined with the actual situation of local population growth, analyze the impact of population size on the environment, society and personal life.

(2) Impact of population growth on the environment

Population growth will have a huge impact on _____, _____ and _____.

(3) Family planning

Family planning is a __________ in our country, and its basic principle is to delay marriage and childbearing, __________.

Question one:

What impact will deforestation have on the local natural environment? What impact does it have on the biosphere?

Ecosystems are destroyed and species disappear in large numbers.

Soil and water loss, rainfall has dropped sharply, and the environment has become desertified.

Question two:

Some factories emit large amounts of smoke directly into the atmosphere. What impact will this have on the environment?

The carbon-oxygen balance is destroyed, producing a greenhouse effect.

Sulfur dioxide produces acid rain, seriously damaging vegetation.

PM25 worsens and seriously harms health.

concept

The phenomenon of an organism entering an area where it has not been distributed before and reproducing its offspring.

1. Destroy the ecological environment and cause ecological pollution.

2. Loss of biological diversity.

3. Ecological disasters occur frequently and cause serious losses.

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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:

"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 5 Human beings are also living creatures, and their impact on the biosphere far exceeds that of other creatures. Why is this? The same is true for humans. The impact of modern humans on the biosphere far exceeds...

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

"Analysis of the Impact of Human Activities on the Ecological Environment" Impact of Human Activities on the Biosphere PPT Courseware 4 Think about it and discuss it: Some people compare the earth to a spaceship, in which humans are the passengers. Do you think this metaphor is appropriate? When you're on a ship and you feel like the cabin...

"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: 2024-09-06

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

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