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"One Day's Garbage" Environment and Us PPT Courseware 3
One person produces about 0.8 kilograms of garbage every day. How much does 46 people in our class produce?
0.8*46=36.8 kg
What about a school with more than 1,500 people?
0.8*1500=1200kg=1.2T
What about Wenzhou City? (calculated as 9 million people)
0.8*9000000=7200T
Garbage classification table
Garbage is classified according to its material: plastic, metal, glass, paper, cloth and other garbage
According to whether it is toxic or not, toxic waste and non-toxic waste
According to whether it is perishable or not, it is divided into perishable garbage and non-perishable garbage.
According to the source of waste: domestic waste, industrial waste, agricultural waste
Talk about the impact of garbage on the environment
Answer: The impact of garbage on the environment is mainly reflected in the pollution of the environment. Garbage will pollute water and air, causing harm to people's production and life. Toxic waste can also cause damage to the environment and cause great harm to animals and plants. Therefore, we must control the generation of garbage and find ways to deal with the garbage that has been generated.
1. Recyclable garbage: mainly includes five categories: waste paper, plastic, glass, metal and cloth.
Waste paper: mainly includes newspapers, periodicals, books, various packaging papers, office paper, advertising paper, cartons, etc. However, it should be noted that paper towels and toilet paper cannot be recycled because they are too water-soluble.
Plastics: Mainly include various plastic bags, plastic packaging, disposable plastic lunch boxes and tableware, toothbrushes, cups, mineral water bottles, toothpaste wrappers, etc.
Glass: mainly includes various glass bottles, broken glass pieces, mirrors, light bulbs, thermos bottles, etc.
Metal objects: mainly include cans, cans, etc.
Fabrics: mainly include discarded clothes, tablecloths, face towels, school bags, shoes, etc.
Through comprehensive processing and recycling, pollution can be reduced and resources saved. For example, every ton of waste paper recycled can make 850 kilograms of good paper, save 300 kilograms of wood, and reduce pollution by 74% compared with the same amount of production; every ton of plastic beverage bottles recycled can obtain 0.7 tons of secondary raw materials; every ton of waste paper recycled Steel can produce 0.9 tons of steel, which saves 47% of the cost compared with ore smelting, reduces air pollution by 75%, and reduces water pollution and solid waste by 97%.
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