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Here's your chance to win a copy of The Rational Optimist, the explosive new book from Matt Ridley, author of Genome and Nature Via Nurture…

All you have to do is leave your answer to the question below here: Facebook.com/RationalOptimist and become a fan of the page…

QUESTION: To get an idea of just how landscape-eating the renewable alternatives are, consider that to supply just the current 300 million inhabitants of the United States with their current power demand of roughly 10,000 watts each (2,400 calories per second) would require:


a. solar panels the size of Spain;


b. wind farms the size of Wales;

c. woodland the size of France;


d. hayfields for horses the size of Russia, Canada and China;


e. hydroelectric dams with catchments one-eighth larger than all the continents put together.

(Competition closes 5th July. Standard HarperCollins T&Cs apply: read them [url=http://www.facebook.com/pages/Rational-Optimist/121743391195741?v=app_10442206389]here[/url]…