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每个人每天都会扔出许多垃圾，在一些垃圾管理较好的地区，大部分垃圾会得到卫生填埋、焚烧、堆肥等无害化处理，而更多地方的垃圾则常常被简易堆放或填埋，导致臭气蔓延，并且污染土壤和地下水体。
垃圾无害化处理的费用是非常高的，根据处理方式的不同，处理一吨垃圾的费用约为一百元至几百元不等。人们大量地消耗资源，大规模生产，大量地消费，又大量地生产着垃圾。后果将不堪设想。
从国内外各城市对生活垃圾分类的方法来看，大致都是根据垃圾的成分构成、产生量，结合本地垃圾的资源利用和处理方式来进行分类。如德国一般分为纸、玻璃、金属和塑料等;澳大利亚一般分为可堆肥垃圾，可回收垃圾，不可回收垃圾;日本一般分为塑料瓶类，可回收塑料，其他塑料，资源垃圾，大型垃圾，可燃垃圾，不可燃垃圾，有害垃圾等等
可回收物是指，适宜回收利用和资源化利用的生活废弃物，如废纸张、废塑料、废玻璃制品、废金属、废织物等
可回收物主要包括
报纸、纸箱、书本、广告单、塑料瓶、塑料玩具、油桶、酒瓶、玻璃杯、易拉罐、旧铁锅、旧衣服、包、旧玩偶、旧数码产品、旧家电
可回收物投放要求
1. 轻投轻放
2. 清洁干燥、避免污染，废纸尽量平整
3. 立体包装请清空内容物，清洁后压扁投放
4. 有尖锐边角的，应包裹后投放
Everyone throws out a lot of rubbish every day. In some areas with better waste management, most rubbish is disposed of harmlessly by sanitary landfill, incineration and composting, while more rubbish is often simply piled up or buried It causes the stench to spread and contaminate the soil and groundwater. The cost of harmless disposal of garbage is very high, according to the different disposal methods, the cost of a ton of garbage disposal is about 100 yuan to several hundred yuan. People consume a lot of resources, large-scale production, large-scale consumption, and large-scale production of waste. There will be consequences. From the domestic and foreign cities on the classification of domestic waste, are generally based on the composition of waste, production, combined with the local waste resources and treatment methods to classification. Such as Germany is generally pided into paper, glass, metal and plastic, Australia is generally pided into compostable waste, recyclable waste, non-recyclable waste, Japan is generally pided into plastic bottles, recyclable plastic, other plastics, resource waste, large-scale waste, recyclables such as combustible waste, non-combustible waste and hazardous waste refer to domestic waste suitable for recycling and resource-based utilization Such as waste paper, waste plastic, waste glass products, waste metal, waste fabrics and other recyclables mainly include newspapers, cartons, books, advertisements, plastic bottles, plastic toys, oil drums, wine bottles, glass cups, cans, old iron pot, old clothes, bags, old dolls, old digital products, old household appliances recyclables requirements 1. Light Release 2. Clean, dry, avoid pollution, waste paper as smooth as possible 3. Three-dimensional packaging, please empty the contents, clean and then drop flat. Sharp edges and corners should be wrapped and dropped