recycle –v. to reuse something that has been used before often in another way

strain – n. a type of disease or plant

enzyme – n. a chemical substance produced by living cells that makes particular chemical reactions happen in animals and plants

fungus– n. a type of plant without leaves that gets its food from other living or decaying things

ecosystem – n. a biological community of interacting organisms and their physical environment

drastic – adj. sudden or extreme