Related article on CNN
http://www.cnn.com/2011/TECH/innovation/08/14/solar.light.bulbs/index.html?&hpt=hp_c2
So often, he says, large aid organizations simply don't understand what people need.
Polack points to the example of a product called the Play Pump. It seems like a great idea: A children's merry-go-round operates as a water pump. As children play on it, it pumps water into a holding tank.
In 2006, the United States invested more than $16 million in a massive effort to install Play Pumps across sub-Saharan Africa. Four years later, 4,000 Play Pumps had been installed.
But according to a UNICEF report the Play Pumps haven't worked as promised.
At $14,000 each they are expensive. And the children grew bored of the hard work of "playing" on the merry-go-rounds, forcing women in the village to operate the pumps. In addition, the pumps proved to be unreliable, and when they break they require expert technicians to repair them, according to UNICEF.
Polak says this is exactly the wrong approach because the people living in the villages were not given an opportunity to choose whether these pumps would work in their communities.
"They're not going to spend their money on it if it doesn't make sense," Polak says. "The problem with a lot of these things using the charity model is that they get these things foisted on them."
Polak's nonprofit markets a pump of its own, which costs about $8 to make and sells for $25. Polak says a small family farmer who buys a pump can increase his annual income by $100.
He says they have sold 1.5 million in Bangladesh alone and have created thousands of jobs in turn.
"We have 3,000 (villages) dealers making an income and 3,000 well drillers making an income, and 75 workshops making the pumps making an income," Polak says.