The extraordinary true story of a Malawian teenager who transformed his village by building electric windmills out of junk is the subject of a new book, The Boy Who Harnessed the Wind.
Self-taught William Kamkwamba has been feted by climate change campaigners like Al Gore and business leaders the world over.
His against-all-odds achievements are all the more remarkable considering he was forced to quit school aged 14 because his family could no longer afford the $80-a-year (£50) fees.
When he returned to his parents' small plot of farmland in the central Malawian village of Masitala, his future seemed limited.
But this was not another tale of African potential thwarted by poverty.
Defence against hunger
The teenager had a dream of bringing electricity and running water to his village.

<deletia>


Mr Kamkwamba, who is now 22 years old, knocked together a turbine from spare bicycle parts, a tractor fan blade and an old shock absorber, and fashioned blades from plastic pipes, flattened by being held over a fire.
"I got a few electric shocks climbing that [windmill]," says Mr Kamkwamba, ruefully recalling his months of painstaking work.
The finished product - a 5-m (16-ft) tall blue-gum-tree wood tower, swaying in the breeze over Masitala - seemed little more than a quixotic tinkerer's folly.
But his neighbours' mirth turned to amazement when Mr Kamkwamba scrambled up the windmill and hooked a car light bulb to the turbine.
As the blades began to spin in the breeze, the bulb flickered to life and a crowd of astonished onlookers went wild.
Soon the whiz kid's 12-watt wonder was pumping power into his family's mud brick compound.