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    All scientists subscribe ____ the view that it is human activities that have caused the global warming. Huge ____ (quantity) of carbon dioxide produced by burning fuels like coal,  natural gas and oil ____ (result) in the "greenhouse effect". All scientists also agree that the levels of carbon dioxide keep on ____ (increase), so more heat energy tends to be ____ (trap) in the atmosphere. ____ the scientists have different attitudes towards this phenomenon. On the one hand, some think the ____ of increasing the temperature by 5 degrees would be a catastrophe. On the other hand, others are ____ to this view and believe that there will be few bad environmental ____ caused by more carbon dioxide. On the contrary, they think it will be beneficial to plants, crops and a greater range of animals, ____ will make people's life better.