Biodegradable Wastes : Substances that are broken down by the biological processes are said to be biodegradable. These substances are decomposed through the actions of fungi, bacteria, and other living organisms.
For Examples : Food waste, paper, wood, cloth, cow-dung etc.
Non-Biodegradable Wastes : Substances that are not broken down by biological processes. These substances may be in solid, liquid or gaseous form. These substances are inert and simply persist in the environment for a long time or may harm the various members of the ecosystem. These includes DDT, insecticides, pesticides, mercury, plastics, polythene bags, glass, radioactive wastes. These non-biodegradable wastes are major pollutants of the environment.
1. Which is non biodegradable?
a. Wood, paper, leather
b. Polythene, detergent, grass
c. Plastic, detergent, glass
d. Plastic, bakelite, DDT
2. _________ is a biodegradable pollutant.
b. Cotton cloth
3. ___________ is a biodegradable substance.
4. Which of the following is a biodegradable substance?
5. Which of the following is a non-biodegradable substance?
a. Virgin plastic
d. Plant producers