1. How do scientists know that there is the same amount of freshwater on Earth as there has always been?
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The earth's inner core reaches temperatures that are at times greater than 9000°f. what causes this layer to remain solid despite the high temperature?

Which of the following energy sources is not an example of renewable energy? a. a wind turbine farm b. a clean-burning, coal-fired electric plant c. a hydroelectric dam d. a solar panel mounted on a home

Crisis in rivalries between the serbs, croatians and muslims has been going on for centuries and only intensified during the 1990s when non-communist rulers were elected