According to statistics, about 45 billion tons of garbage is produced every year around the world and the amount is increasing.

White pollution: it is plastic wastes, including food packages, disposable meal boxes and plastic bags which all have become global environmental hazards. The complete degradation of common plastic products in nature requires 200-400 years. If buried in soil, they will impede the growth of crops; if eaten by livestock, these animals will suffer from digestive system disease in a less severe case, or they may die in a more severer case; if incinerated, they will release a large amount of toxic gases. Therefore, the treatment to plastic wastes has become a new mission for environmental protection.

Waste battery pollution: the harm of waste batteries is both long-term and latent, and the most harmful substances are cadmium and mercury cells. Experiments have proved that if the toxic substances in a tiny alkaline button cell permeate into the water, 600 cubic meters of water will be polluted. If these toxic substances permeate into the earth, underground water will be polluted; if they are burnt with garbage, the air will be polluted; once they are dumped into the ocean, the life of marine organism will be threatened.

The recycle and reuse of garbage does not only solve environmental pollution, but also develop new resources for production and our lives. Separate collection of garbage is good for recycling and reducing environmental pollution. Generally, garbage is separated by those that can be recycled and those that cannot. Recyclable garbage includes cullet, waste paper, waste plastics, scrap metals and waste batteries and so on.

Regeneration of waste paper: recycle 1 ton of waste paper can produce 800kg of regenerated paper, which means 17 large trees can survive from deforestation and a 3 cubic meters room of landfill is saved. In addition, waste water from papermaking can also be reduced. Each piece of paper can be recycled at least twice.

Garbage power: incinerate combustible refuse in urban area will produce heat which in turn generates electricity for neighboring residents. The volume of the remains is just less than 5% of the original amount, and it also can kill various bacteria and virus to prevent them from converting some hazardous substances into harmless ones.