In addition to environmental mismanagement, Lake Baikal's fragile and unique ecology is seriously threatened by
A) tourism.
B) climate change.
C) gold mines.
D) oil refineries.
Answer: B
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Any of the Mesozoic flying reptiles that had a long finger to support a wing:a
archosaur d. tetrapod b. pterosaur e. therapsid c. plesiosaur
Which one of the following energy sources can rapidly generate the greatest additional power without contributing significantly to global climate change?
A) Solar technologies B) Hydroelectric power C) Nuclear energy D) Geothermal energy
Grasses are considered ________.
A. medium-weight fuels that burn easier during their growing season B. fire dampeners, especially during the late summer C. lightweight fuels that are easy to burn when dry D. heavyweight fuels that can burn if conditions are just right
Which of the following physical properties would you expect for krypton (Kr)?
A) a gas at room temperature B) hard C) brittle D) shiny E) conducts electricity