What is contaminated groundwater so difficult to clean?
A)Groundwater moves so quickly.
B)Groundwater does not move at all.
C)Groundwater moves so slowly.
D)Subsidence pushes the contamination deeper underground.
E)Septic systems are so common.
Question 2
A lahar may form when ____.
A)lava is cooled quickly underwater
B)volcanic gas is erupted into the stratosphere
C)lava cools and cracks along joints
D)magma moves through fissures in the country rock
E)rain falls on unconsolidated pyroclastic materials
Water potentials decrease (become more negative) as one moves from soil to plant to atmosphere
In 2008, the U.S. economy suffered a gaping wound as several trillion dollars were ripped out of it.
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The Clean Development Mechanism allows developed countries