As an engineer, I am cognisant of the fact that many serious maladies facing the world today have the potential for fixes with improvements to technology and base infrastructure, especially in the developing world.
A fantastic new development in this spirit was recently previewed on, of all places, the Colbert Report. Dean Kamen--yes, the inventor of the Segway--showed Stephen his new water purifier. It truly is an amazing device. It would seem to me that it has great potential to change the water game in Third World countries.