________ Were Introduced into Western Europe in the Middle Ages

Q59: The first fuel was<br>A)coal.<br>B)petroleum.<br>C)blubber.<br>D)wood.

Q60: Which problem do all power plants have

Q61: The statement "you can't get something for

Q62: The most energy efficient method for converting

Q63: Catalytic reforming is a process for converting<br>A)low

Q65: Anthracite has a higher carbon content than

Q66: The use of gasoline is an endothermic

Q67: Photovoltaic cells convert<br>A)solar energy into chemical energy.<br>B)solar

Q68: Biomass does NOT produce<br>A)asphalt.<br>B)methane.<br>C)ethanol.<br>D)biodiesel.

Q69: Fuels are _ forms of matter.The energy