Its harm lies in its carcinogenic effect on people.
paper
Computer reports, envelopes, post-it notes, magazines, books, calendars, wrapping paper, leaflets, copy paper, recycled paper, newspapers, phone books, cartons, paper bags, business cards, paper candy gift boxes, corrugated paper, toilet paper rolls, shopping paper bags, other pure pulp products, etc.
Other recyclable items
Tin cans, aluminum cans, aluminum foil bags, detergent cans, glass (bottles, cups, plates, cans), food (drinks) paper box bags, food (drinks) plastic cans (cups),
Scrap iron and other recyclable materials with recycling marks.
Ordinary garbage
Non-recyclable materials.
Batteries, light bulbs (tubes), discarded computers. ※
Urban domestic waste, medical waste and some industrial and construction waste are inevitable wastes in human life. Chemical analysis shows that garbage contains many toxic and harmful substances, such As heavy metals as, Pb, Cu, Cd, Cr, Hg, Ni, Mn, and organic compounds, such as aromatic hydrocarbons, chlorinated organics, polychlorinated biphenyls (PCBs) and harmful microorganisms.
These wastes contain harmful substances or harmful microorganisms, such as pathogenic bacteria and viruses; Or organic pollutants, such as chlorinated hydrocarbons, hydrocarbon gases and other carcinogens and carcinogens; Or inorganic pollutants such as mercury, cadmium, lead, arsenic, zinc, chromium, etc. Or physical pollutants, such as radioactive pollution; Or other pollutants, such as parasites, pests, smells, etc. These pollutants pollute soil, air and water and endanger human health through various channels.
The first is direct injury. Garbage is rich in protein, lipids and sugars. At room temperature, NH3, H2S and harmful hydrocarbon gases are produced in the process of decomposing organic matter by microorganisms, which have obvious stench and toxicity and directly harm human body.
The second is indirect injury. Garbage dumps are breeding grounds for mosquitoes, flies, mice and insects. Landfill leachate and wetlands are habitats for spawning, larval reproduction and adult mosquitoes. Mosquitoes, especially Culex pipiens pallens, like to suck human blood and are the vectors of malaria, schistosomiasis and Japanese encephalitis. Flies feed on all kinds of decaying organic matter, which is the source of infectious diseases such as cholera, dysentery, typhoid fever and hepatitis. Rats inhabit kitchens, sewers and sundries, and are the source of plague, leptospirosis and blood-sucking diseases. Cockroaches and other insects often feed in places with water, carrying intestinal pathogens and parasitic eggs, and are vectors. It can be seen that the garbage dump has become a "base camp" for mosquitoes, flies, rats and insects to inhabit and reproduce and harm the human body everywhere. As municipal solid waste contains a large number of aromatic organic compounds and chlorine-containing organic compounds, it will form chlorinated dibenzo-dioxins (PCDD) and chlorinated dibenzofurans (PCDF) when burned at will, which are strong carcinogens. Random garbage will produce CO2, CH4 and toxic gas H2S due to biological action, and garbage piled in the open air will also lead to explosion accidents.
The third is the risk of attachment. Harmful substances in garbage pollute air, soil and water, and then invade human body with air, soil, water and food as media or carriers, causing people to suffer. Soil is the central link of material exchange and material circulation in ecosystem. Heavy metals and a lot of organic matter, eggs and larvae of worms (hookworms and roundworms), and pathogenic bacteria (bacteria, viruses, etc. ) into the soil, accelerating the reproduction of worms and pathogenic microorganisms. These hazards may be carried when picking vegetables and fruits. When people eat unclean vegetables and fruits, the harm will invade the human body, forming a vicious circle of urban garbage polluting the countryside and crops polluting the city. Contaminated soil, when its dust flies with the wind, the harm carried by the dust, especially tuberculosis, enters the human body through the respiratory tract. If landfill leachate flows into water through soil, it will pollute water sources and aquaculture waters, and pollutants will be enriched in water, absorbed by fish, shellfish and aquatic products and eaten by people, causing harm to human body.