Inactive volcanoes are called dormant volcanoes. Mount (Mt.) Rainier is dormant, but may not be in the future.
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China faces serious social and economic problems associated with overpopulation in the years to come. Overly populated regions lead to degradation of land and resources, pollution, and detrimental living conditions.
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can you please translate this in English
Because of oceans, mountains, and trenches, the earth is not as round.