First , I have to explain what is non - biodegradable waste . it is the waste which cannot be decomposed or you can say it does not get mixed with soil . It also harms our planet . Stray cows eat polythenes along with food . It causes very serious diseases to them . It also blocks pipelines , sewage waste etc. We have to use minimum non - biodegradable wastes like thermacol , polythenes , plastic etc. Lets save our planet from being polluted .