What is the key concept for this section? Distinguish between a passive solar heating system and an active solar heating system and list the major advantages and disadvantages of using such systems...

What is the key concept for this section? Distinguish between a passive solar heating system and an active solar heating system and list the major advantages and disadvantages of using such systems for heating buildings. What are three ways to cool houses naturally? What are solar thermal systems, how are they used, and what are the major advantages and disadvantages of using them? What is a solar cell (photovoltaic or PV cell) and what are the major advantages and disadvantages of using such devices to produce electricity?