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However, the attitudes of scientists     this rise are completely different. On the one hand, Dr. Foster thinks that any       in which the temperature increases by 5 degrees would lead to a catastrophe. She says, “We can’t predict the climate well enough to know       to expect, but it could be very serious.” Others      agree with her think there may be a rise of several metres in the sea level, or predict severe storms, floods,      (dry), famines, the spread of diseases and the disappearance of species. On the      hand, there are those, like George Hambley, who are      to this view and believe that we should not worry about high levels of carbon dioxide in the air. They predict that any warming will be mild with few bad    _   (environment) consequences. In fact, Hambley      , “More carbon dioxide is a positive thing. It will make plants grow quicker; crops will produce more; it will encourage a greater      of animals---all of which will make life for human beings better.