poison - A substance that is capable of causing illness or death, pollute - To contaminate with harmful or poisonous substances, prevention - The action of stopping something from happening, protect - To keep safe from harm, recycle - To return a material to a previous state so that it can be used again, reusable - Capable of being used again or repeatedly, disaster - A sudden accident or a natural catastrophe that causes great damage or loss of life, disposal - The action of getting rid of something, drought - A prolonged period of abnormally low rainfall, leading to a shortage of water, dust - Fine, dry powder made up from tiny particles of earth or waste matter lying on the ground / surfaces or carried in the air, energy efficient - using less energy to provide the same service as before, environment - The surroundings or conditions in which a person, animal, or plant lives, flood - An overflow of a large amount of water beyond its normal limits, especially over what is normally dry land, geothermal - Energy derived from the heat of the earth, greenhouse effect - The trapping of the sun’s warmth in a planet’s lower atmosphere by the increase in the levels of greenhouse gases, heat wave - abnormally hot weather, leak - Accidentally lose contents, especially liquids or gases, through a hole or a crack, oxygen - A colourless and odourless gas that is life-supporting, ozone layer - A layer in the earth’s atmosphere that screens out the sun's harmful ultraviolet radiation, wind energy - Electrical energy obtained by making use of wind turbines,

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