Differentiation between biodegradable and non-biodegradable substances are
`{:(,"Biodegradable substances",,"Non-biodegradable substances",),(,"Substances that are broken down into simpler substances by biologial processes",,"Substances that cannot be broken down into simpler ones by biological processes.",),(,"They are environment friendly as they usually do not pollute the environment",,"They are not environment friendly as they are major pollutants of the environment",),(,"e.g., Wool, paper, cotton, fruit and vegetable peels, leaves etc.",,"e.g., DDT, polythene bags, plastics, metal articles like iron nails, synthetic fibres etc.",):}`
