What damages are being done to the environment?我自己查到的有白色污染、河

Given key words such as littering,pollution,and poisonous substances,people may find it easier to remember some of the dangers.
Littering
Some people throw away paper,cigarette butts,empty cans or even batteries in public places or in scenic sites.
Pollution
When households and factories dump sewerage and harmful substances into rivers and lakes,water pollution can be serious.Air pollution may worsen as the economy develops.If the smoke from factory chimneys does not meet environmental standards,it pollutes the air.Also,the increasing number of cars brings further deterioration to the quality of the air.The cigarettes people smoke also contribute to the pollution.
Poisonous Substances
When we discard air-conditioners and refrigerators,we release poisonous substances like CFCs(氟氯化碳),which deplete the ozone layer(臭氧层) or create a hole in the ozone layer.When you use aerosol spray on your hair,you are spreading environmentally-damaging freon(氟里昂) as well.