Sue Ann

What is the apparent contradiction in the statement that "solar energy is free" with the fact that solar cells are too expensive to use as an energy source.

What is the difference between a compound and a molecule?

Until recent times, democracy—that is freely elected governments and civil societies (something we take for granted in the US) were not considered desirable in many Third World Countries. Why was that the case? Why has this changed in recent times?

Apartheid in Africa was dismantled in a relatively speaking peaceful way. What other ethnic conflicts do you know about that were resolved peacefully in the developing world? Any Examples?