identifying genes - Scientists have done a lot of research into identifying genes that cause cancer, solar power - ... is good for the planet because it uses energy from the sun, which will never run out, global birth rate - The ... tells us how many babies are born each year, earthquake - An ... earthquake happens when rock under the Earth moves suddenly., increased dramatically - The price of oil has gone up very quickly. It has ... since January., falles steadily - There has been a regular decrease in the price of gas. It has ... since January., predict - Scientists can't ... when we will be affected by drought,

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