"Chemical Synthetic Materials" Modern Life and Chemistry PPT Courseware 3

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"Chemical Synthetic Materials" Modern Life and Chemistry PPT Courseware 3

1. Plastic and white pollution

1. White pollution

The sharp increase in synthetic waste has also brought about environmental problems, and the "white pollution" caused by discarded plastics is particularly serious.

New knowledge exploration

Most plastics are difficult to degrade in the natural environment. Long-term accumulation will damage the soil, pollute groundwater, and endanger the survival of marine life; and if chlorine-containing plastics are burned, toxic hydrogen chloride gas will be produced, thus polluting the air.

2. Measures to solve white pollution

To solve the problem of white pollution, we should start from the following aspects:

① Reduce the use of unnecessary plastic products, such as using cloth bags instead of plastic bags;

② Reuse certain plastic products such as plastic bags, plastic boxes, etc.;

③ Use some new, degradable plastics, such as microbially degradable plastics and photodegradable plastics;

④ Recycle various waste plastics.

3. Plastic recycling and utilization

Recycling waste plastics not only reduces the amount of waste plastics, but also saves resources.

Classified garbage collection is conducive to resource recycling

The classification of plastics is a major obstacle to recycling and reuse because different types of plastics have different reuse pathways. In order to solve this difficulty, some countries have begun to print or emboss logos on plastic products for the type of material used.

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Update Time: 2024-10-02

This template belongs to Chemistry courseware Cantonese Education Edition Ninth Grade Chemistry Volume 2 industry PPT template

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