Typically, open systems interact with elements outside the system, while closed systems have inputs but lack outputs.
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Q72: Any form of environmental protection, including preservation,
Q73: What is currently the largest protected ecosystem?
A)
Q74: Adaptation to climate change might involve which
Q75: The concept of sustainable development was introduced
Q76: An important early technological advance was humans'
Q78: Something becomes a resource only if humans
Q79: Water power is tapped from sources such
Q80: The UN's Intergovernmental Panel on Climate Change
Q81: Wind turbines are not only a viable
Q82: More developed countries remain unable to make
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