Present in humans with the invention of plastic plant pots, terracotta and many others, which in the production of plastic and terracotta plant pots that. Require high temperatures to burn and chemical use.It was found that the amount of substance - of hydrocarbon gases such as ethylene and propylene substances causing adverse effects on the world. Some substances can damage the Earth's ozone layer. Cause of global warming Or climate changeThe global average temperature increase even more. Our so-called global warming.