Who is credited with developing the modern theory that variations in the earth's orbit influence climate change?
What will be an ideal response?
Milutin Milankovitch
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What is the difference between ice caps and continental glaciers? What will be an ideal response?
Although hydroelectric dams generate electricity without directly producing greenhouse gases, they ________
A) eliminate wildlife habitats and affect the temperature of waterways B) produce as much other air pollutants as coal-fired power plants C) are short-lived structures that have to be rebuilt about every 20 years D) contribute only about 5% of global electricity production
The earth formed approximately ________ years ago.
a. 13,700,000,000 b. 4,600,000,000 c. 5,000 d. 4,600,000
Ethnic minorities are first and foremost associated with homelands. This is true of which of the following?
A. Welsh B. Bretons C. Basques D. All of these