DROUGHT, A long period with little or no rainfall., EMISSION, The act of releasing gas, smoke, or pollutants into the air., OVERFISHING, Catching too many fish so their population cannot recover., RENEWABLE, A natural resource that can be replaced and will not run out., COMPOST, Decayed organic material used to fertilize soil., LANDFILL, Place where rubbish is buried, DEFORESTATION, Large-scale removal of trees in forests, FLOOD, A large amount of water that covers land which is normally dry., REUSABLE, Something that can be used more than once instead of being thrown away.

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