What are the enivronmental problems around us?
According to the report issued by the United Nations Environment Programme (UNEP) in 2021,from 1950 to 2017, about 9.2 billion tons of plastic were produced globally, of which the recycling rate of plastic was less than 10%, and about 7 billion tons became plastic waste. It is estimated that by 2040, about 710 million tons of plastic waste will be discarded into natural environment every year. The American "Science Advances" magazine warned that in 2050, there will be more than 13 billion tons of plastic waste on the earth, and blue earth may become a "plastic planet".