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There has been a steady rise in the average temperature around the planet over the last hundred years or so, and the majority of scientists put it (1) to human activity. The solution, they claim, is to cut back (2) our consumption of fossil fuels, which produce the carbon dioxide that drives global warming. However, some scientists argue that the historical evidence shows that over time the Earth heats (3) and cools (4) naturally. According to them, we should just continue to get (5) the fossil fuels that are available and find alternatives when they run out.
Whatever the cause of global warming, the increase in temperature is undeniable. It is predicted that over the next few decades many species will die (6) as once fertile areas turn to desert. Seas will rise in some areas and rivers will dry (7) in other areas, killing (8) animal and plant life that rely on them. It looks like this debate will only get more intense.
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