"Environmental Issues and Our Actions" Environment and Us PPT download

Description

"Environmental Issues and Our Actions" Environment and Us PPT download

Part One: Exploring New Knowledge

Air Pollution

Air is an earth resource that we need every moment of our lives. While industry and urban development create wealth for mankind, they also discharge billions of tons of waste gas and waste into the atmosphere. Factory chimneys emit black smoke, cars and airplanes emit exhaust gas...

What is air pollution?

Air pollution usually refers to the phenomenon of certain substances entering the atmosphere due to human activities or natural processes, showing sufficient concentration for a sufficient period of time, and thus endangering human comfort, health or environmental pollution.

There are two types: natural factors (such as forest fires, volcanic eruptions, etc.) and man-made factors (such as industrial waste gas, domestic coal burning, automobile exhaust, nuclear explosions, etc.), with the latter being the dominant factor, especially those caused by industrial production and transportation. . There are also burning wheat straw and rice straw in farmland, and chemical plants emitting harmful gases. The harm of air pollution caused by human factors is more serious.

Air pollution affects our health. For example, floating dust in the atmosphere can easily cause disease in the respiratory system. Reducing exhaust gas and waste emissions is the most fundamental way to control air pollution.

1. Many countries have formulated corresponding laws and regulations to reduce exhaust gas and waste emissions and strictly control vehicle exhaust emission standards.

2. Promote “Car-Free Day” activities.

3. Drive less and try to take the bus or choose environmentally friendly transportation.

4. It is forbidden to burn wheat straw and rice straw.

Environmental Issues and Our Actions PPT, Part 2: Expansion and Extension

Global environmental action, let us work together to protect our homeland

Global environmental action refers to the joint actions taken by countries around the world on environmental issues.

Recognizing the potential dangers that environmental pollution and ecological destruction bring to human survival and development, the United Nations convened the first Conference on the Human Environment in 1972 and adopted the "Declaration on the Human Environment", proposing the slogan "There is only one Earth" to remind The whole world is paying attention to environmental issues and calls on governments and people of all countries to work together to maintain the environment for human survival.

In June 1991, China initiated and hosted the "Ministers' Conference on Environment and Development of Developing Countries" in Beijing. 41 countries from Asia, Africa and Latin America sent delegations to attend the conference. The conference issued the "Beijing Declaration", emphasizing the : "We ensure that environmental protection and sustainable development are issues of common concern to mankind" and require the international community to take effective actions to protect the environment.

Global Warming and the Kyoto Protocol

Global warming is caused by the abnormal greenhouse effect. Due to the massive exploitation and use of coal, oil and other mineral energy, coupled with deforestation, the concentration of carbon dioxide in the atmosphere is increasing year by year.

Environmental issues and our actions PPT, part three: summary of this lesson

1. What is air pollution and how air pollution affects our health?

2. White pollution. Countermeasures: Biodegradable plastics made by optimizing the selection of production raw materials and production processes

3. The rate of species extinction is accelerating. Due to the massive destruction of global forests and the deterioration of the marine environment, the current extinction rate of biological species is 1,000 times the natural extinction rate. Indiscriminate hunting and over-exploitation by humans have brought many biological resources to the brink of depletion.

Environmental Issues and Our Actions PPT, Part 4: Exercises for this Lesson

1. Judgment questions

1. In 1909, American chemist Baekeland invented synthetic plastic. ( )

2. Plastic packaging has become a necessity in human life because it is convenient, lightweight and easy to store. ( )

3. Living things on Earth are disappearing more slowly today than ever before. ( )

4. There were once hundreds of thousands of biological species on the earth, more than half of which lived and thrived in forests. ( )

5. Scientists are also developing solar cars and fuel cell cars to reduce air pollution. ( )

2. Fill in the blanks

1. _________ is an earth resource that we need every moment of our lives.

2.____________________ is the most fundamental way to control air pollution

3. The United Nations held its first Conference on the Human Environment in 1972, adopted _______________ and put forward the slogan "There is only one Earth".

4. Try to take buses or choose environmentally friendly transportation methods when traveling, which can effectively improve the quality of ________.

3. Short answer questions

1. What is air pollution?

Air pollution usually refers to the phenomenon of certain substances entering the atmosphere due to human activities or natural processes, showing sufficient concentration for a sufficient period of time, and thus endangering human comfort, health or environmental pollution.

2. Why are many animals and plants extinct?

Due to the massive destruction of global forests and the deterioration of the marine environment, the current extinction rate of biological species is 1,000 times the natural extinction rate. Indiscriminate hunting and over-exploitation by humans have brought many biological resources to the brink of depletion.

Environmental Issues and Our Actions PPT, Part 5: Homework

Share, what kind of experience do you have after studying this course?

Keywords: Free download of science PPT courseware for the second volume of sixth grade in the textbook version, environmental issues and our actions PPT download, environment and us PPT download, .PPT format;

For more information about the "Environment and Us Environmental Problems and Our Actions" PPT courseware, please click the "Environment and Us ppt Environmental Problems and Our Actions ppt" tag.

"Environmental Issues and Our Actions" Environment and Us PPT:

"Environmental Issues and Our Actions" Environment and Us PPT Part One Content: Air Pollution Air is an earth resource that we need every moment in our lives. While industry and urban development create wealth for mankind, they also discharge billions of tons of waste gas and waste.

File Info

Update Time: 2024-07-12

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 2 industry PPT template

Preview