Ending poverty and ensuring sustainability are the defining challenges of our time. Energy is central to both of them.

Water and sanitation has not had the same kind of champion that global health, and even education, have had.

We need to have a plan equal to the challenge.

If we do not act to curb climate change immediately, we will leave our children and grandchildren an unrecognizable planetIt is the poor, those least responsible for climate change and least able to afford adaptation, who would suffer the most.

We will never end poverty if we don't tackle climate change.

When you're working on development issues, optimism is not always based on rational analysis, often it is a moral choice.

One of the most important things about leadership is that you have to have the kind of humility that will allow you to be coached.