What are the hazards of plastic bags

Because plastic bags are mostly non-renewable material production, plastic structure is not easy to be the natural microbial degradation, not isolated for a long time in a natural environment. Serious damage on land, will change the pH of the land, pollute soil, affecting crop nutrients and moisture, resulting in agricultural production, the sustainable use of land. Harmful fumes and toxic gases produced by burning, also resulted on atmospheric pollution. So now that plastic bags have become a 20th century man "the worst invention."
1. effects of agricultural development. Mixed waste plastics accumulated in the soil, will affect the crop nutrients and moisture, resulting in crop production.
2. the threat to the survival of animals. Abandoned on land or in water, waste plastics, was swallowed by animals as food, lead to animal deaths. Such things are common in the Zoo, pasture, rural, marine.
3. waste plastics landfill will not only take up a lot of land, land occupied and not long-term recovery, sustainable use of land. Go to waste in solid waste landfill in plastic if its 200 years of degradation. Serious damage on land.