"Environmental Issues and Our Actions" Environment and Us PPT

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"Environmental Issues and Our Actions" Environment and Us PPT

Part One: 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.

In production and life, what behaviors do people pollute the atmosphere?

Factory exhaust, car exhaust

Burning straw and barbecue outdoors

forest fire volcano eruption

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. Many countries have enacted legislation to reduce exhaust gas and waste emissions, such as formulating strict vehicle exhaust emission standards.

In recent years, our country has actively promoted "Car-Free Day" activities to save energy and protect the environment. Driving less and taking buses or choosing environmentally friendly modes of transportation can effectively improve air quality. Scientists are also developing solar cars and fuel cell cars to reduce air pollution.

Environmental issues and our actions PPT, part 2: white pollution

When the American chemist Baekeland invented synthetic plastic in 1909, mankind was so ecstatic! Plastic packaging has become a necessity in human life because it is convenient, lightweight and easy to store.

While people enjoy the convenience of life brought by plastic products, they are deeply troubled by the problem of "white pollution".

It will not rot or degrade for months or even hundreds of years.

It is light in weight, large in size and abundant in quantity. It hangs on treetops, fills rivers and accumulates in the soil.

By optimizing the selection of raw materials and production processes for degradable plastics, the degradation performance of plastic products can be significantly improved. After days or months of exposure to the sun, rain, and the combined action of microorganisms, plastic products can be transformed from their original The shape gradually breaks down into fragments until eventually it all degrades. Therefore, compared with traditional non-degradable or refractory plastics, degradable plastics are more environmentally friendly.

Environmental Issues and Our Actions PPT, Part 3: The Accelerating Rate of Species Extinction

There were tens of millions of biological species on the earth, more than half of which lived and thrived in forests. Today, living things on Earth are disappearing faster than ever before.

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.

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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.

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"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 in our lives. While industry and urban development create wealth for mankind, they also consume billions of tons of...

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Update Time: 2024-11-22

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

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