I've always been more interested in organisms that can move on their own than in stationary plants. But when I canoe or hike along the edge of lakes or oceans and see trees that seem to be growing out of rock faces, I am blown away. How do they do it?

The failure of world leaders to act on the critical issue of global warming is often blamed on economic considerations.

The future doesn't exist. The only thing that exists is now and our memory of what happened in the past. But because we invented the idea of a future, we're the only animal that realized we can affect the future by what we do today.

If America wants to retain its position as a global power, its president must listen to the people and show strong leadership at this turning point in human history.

I'm very much a leader in a lot of the work that I do or that I've done in my career.

I applaud the work of Clean Power Lake County in their leadership to call for Lake County to build a just transition from coal to clean energy, and I'm proud their work will be highlighted on the national stage for TV viewers around the country.

Business leaders, social justice groups, farmers and ranchers, doctors and nurses and people from all walks of life are concerned about the climate threat.

Every global leader that I have seen has at least agreed on one point: I do have the world's most difficult job. But I hope to make it easier for my successor.