1. two hundred years to rot. Plastic bags buried in the ground after about two hundred years to decay, will seriously pollute the soil; if you take the incineration treatment, it will produce harmful smoke and toxic gases, long-term pollution of the environment.
2. Degradable plastics are difficult to degrade. The common market "degradable plastic bags", in fact, only in the plastic raw materials added starch, landfill because of the fermentation of starch, bacterial decomposition, large plastic bags will be decomposed into small and even invisible fragments. This is a physical degradation, and does not fundamentally change the chemical nature of plastic products.
3. Affect the normal respiration of the soil. The plastic bag itself is not one of the basic substances of the soil and water body, after forcing into the soil, because of its own impermeability, it will affect the transfer of heat inside the soil and the growth of microorganisms, thus changing the qualities of the soil. The accumulation of these plastic bags over a long period of time will also affect the absorption of nutrients and water by crops, leading to a reduction in crop yields.
4. Easy to cause animal accidental food. Abandoned on the ground and the water surface of the plastic bags, easy to be swallowed by animals as food, plastic bags in the animal stomach and intestines can not be digested, easy to lead to animal muscle damage and death.