Because of the durable nature of plastics - they last a long time, the impact on the environment is a concern.
Plastic does not easily decompose
. Disposal in landfills does not work
.. Huge quantities of waste plastic now drifts in the oceans.
Burning causes pollution.
Some plastics can be re-manufactured into new products.
Automobile tires can shredded, cleaned and turned into athletic tracks, flooring mats and even as fuel supplement in the pulp and paper industry.
Other plastics can be madfe into outdoor furniture.