"Pollution and Protection of Waters" PPT courseware

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E-education edition fifth grade science volume 2	pptx	6 MB

"Pollution and Protection of Waters" PPT courseware

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Upload Time: 2024-11-22

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"Pollution and Protection of Waters" PPT courseware

Discussion and reflection

Hunan has many lakes and the Yangtze River passes through it, so our hometown is an area rich in water resources. So have you observed the rivers and lakes around us? Are they contaminated? Tell us what you saw and heard.

Let’s talk about it:

Based on your usual observations and the pictures just now, tell us your thoughts.

Everyone wants to have clean and pollution-free water to live, but it is humans who have polluted these precious water sources.

The main problems existing in my country’s water resources:

The per capita amount of water resources in my country is small;

Water resources are unevenly distributed across regions

Floods and droughts are frequent.

Industrial waste

Steel plants, coking plants, refineries, chemical plants, paper mills, pesticide plants and tanneries are all heavily polluting enterprises. They not only discharge large amounts of wastewater, but also produce a lot of waste gas and waste residue.

Agricultural chemical pollution

Toxic pesticides and fertilizers sprayed on farmland are washed away by rain and enter natural waters, causing pollution.

domestic sewage

It refers to the wastewater discharged during our daily washing of clothes, vegetables, bathing, etc.

Keywords: Water pollution and protection teaching courseware, E-education edition fifth grade science PPT courseware download, volume 2, fifth grade science slide courseware download, Water pollution and protection PPT courseware download, .PPT format;

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Update Time: 2024-11-22

This template belongs to science courseware E-education edition fifth grade science volume 2 industry PPT template

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Pollution and protection of waters PPT

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"Pollution and Protection of Waters" PPT courseware