There are 60 million generators in Nigeria. The generator owners and distributors have a strong incentive to not encourage the distribution of solar and other alternative energies, even though it's better for the country, it's better for people. As a world, we've got to get more serious about confronting those obstacles. This knows no culture, no race, no ethnicity.

Entrepreneurs are the seekers of solutions, and that they will go into these places where both market and traditional aid has failed or traditional charity has failed.

There are cases where government-to-government aid actually has worked. Look at the eradication of smallpox and the near eradication of polio. But these are really top down solutions that require government-to-government support and aid.

The time for change is now.

For too much of history, we've viewed the world's precious resources - both environmental and human - as things to extract, to make the most of in order to maximize their potential.

People have to understand that unless social enterprise is experimental, it will not succeed in making a difference.

A sustainable world means working together to create prosperity for all.