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"Classification and Recycling" Environment and Us PPT Courseware 2
Do you know what is recycled in the waste recycling bin?
Plastic: It can be melted and formed multiple times. Recycling plastic can reduce environmental pollution.
Glass: Recycling glass is cheaper than making it directly from natural raw materials. Because the melting temperature of glass is much lower than the temperature of melting with raw materials.
Benefits of packaging
The recycling of garbage requires the classification and concentration of usable materials. To effectively recycle, we must change the old habit of mixing garbage and classify and package domestic waste. This is the obligation of every citizen.
The ultimate goal of garbage classification is a resource recycling society. Garbage mixing treats garbage as waste, while garbage sorting treats garbage as resources; mixed garbage is sent to landfills, occupying a large amount of land, and separated garbage is distributed to various recycling departments. Occupying land; mixed garbage will pollute the land and atmosphere whether it is landfilled or incinerated, while separated garbage will promote harmless treatment; mixed garbage increases the work of sanitation and environmental protection departments, and separated garbage only requires a little effort from us. Moreover, garbage classification and packaging facilitate the treatment of toxic waste.
1. Recycling waste plastics – developing the “second oil field”
Many waste plastics can be reduced to recycled plastics, and all waste plastics, waste lunch boxes, food bags, woven bags, flexible packaging boxes, etc. can be recycled into fuel. One ton of waste plastic can recycle at least 600 kilograms of gasoline and diesel. No wonder some people call recycling old plastic the development of a "second oil field."
2. Recycle used batteries – to prevent tragedy from happening again
"Itai-itai disease" and "Minamata disease" are both industrial pollution diseases that occurred in Japan. This is due to industrial wastewater containing cadmium or mercury contaminating soil and water sources and entering the human food chain. "Minamata disease" is mercury poisoning. Due to the accumulation of large amounts of methylmercury in the body, patients suffer damage to the central and peripheral nerves of the brain. In mild cases, the hands and feet are numb, and in severe cases, death. "Itai-itai disease" is caused by cadmium poisoning. Patients suffer from pain in their hands and feet and are prone to fractures throughout their bodies. People who suffer from this disease keep shouting "It hurts! It hurts!" until they die, so it is called "Itiny disease". Since ordinary soil dry batteries contain these two toxic metal elements, pollution is always lurking in the battery from production to disposal. Battery recycling is imperative!
3. Recycle waste paper – regenerate forest resources
Recycling 1 ton of waste paper can produce 800 kilograms of good paper, cut down 17 large trees, save 3 cubic meters of landfill space, save more than half of papermaking energy, and reduce water pollution by 35%. Each piece of paper Can be recycled at least twice. After the first recycling, office paper, old letter paper, notebooks, books, newspapers, advertising paper, loan wrapping paper, cartons, paper tableware, etc. can be recycled into books, manuscript paper, business cards, etc. Notes etc. After the second recycling, it can also be made into toilet paper.
compost bin
Food waste, weeds, fallen leaves, etc. are mixed into the sewage, piled up, and covered with a layer of soil. The decomposition time generally takes 1 to 3 months. The decomposed garbage can be used as base fertilizer.
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