Which is true for all renewable energy resources? a. they all formed deep within the earth over millions of years. b. they are continuously replenished by natural processes. c. they are made of recycled manufactured products. d. they can be used in their extracted form without further refinement.

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle

Which country in the video has the highest population growth rate?

Where is the only active diamond mine in the u.s.?