What happens when corn and wheat prices rise is that we see real increases in malnutrition and under-nutrition. And when children are malnourished, their brain development actually slows down and is affected. So this is not just a short-term impact.

Unless you invest in people, you are not going to see growth in the long term, the medium term, and maybe even the short term.

We have to find climate-friendly ways of encouraging economic growth. The good news is we think they exist.

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.

Carbon is the currency of how you measure climate change, but water will be the teeth.

We need to have a plan equal to the challenge.

No matter how good you think you are as a leader, my goodness, the people around you will have all kinds of ideas for how you can get better. So for me, the most fundamental thing about leadership is to have the humility to continue to get feedback and to try to get better - because your job is to try to help everybody else get better.