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Underground coal mines have a high risk of fires, which can burn for many years.
Q17: Food aid policies of rich nations can
Q22: A significant dilemma facing restoration ecologists is
Q23: The Coriolis effect is caused by the<br>A)
Q27: Traditional suburban development does not<br>A) Consist of
Q28: A method of increasing water supplies that
Q32: People who subsist on starchy foods, such
Q32: The most serious drawback to fuel cells
Q44: World coal reserves are substantially smaller than
Q54: The Keeling graph of Carbon Dioxide concentrations
Q61: Most commercial loggers prefer "clear-cut" harvesting because