英语 example sentences with "double over"

Our research indicates that poverty levels will double over the next thirty years if these policies remain in place.
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Since 1945, more land has been converted to agriculture, than in the 18th and 19th centuries combined. At least a quarter of all fish stocks are over-harvested. Ten to 30 percent of mammal, bird and amphibian species are currently threatened with extinction. One-third of the world's population is living in water-scarce or water-stressed areas, and this is projected to double over the next 25 years. But, climate change may do more damage to the Earth than all of these other factors.
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