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.

Every week in the Senate, I give a speech telling my colleagues it is time to wake up to the reality of a changing climate.

In retrospect, the political and cultural climate in the early '60s seems both a time of innocence and also like a sultry, still summer day in the Midwest: an unsettling calm before a ferocious storm over Vietnam, which was not yet an American war.

My dad joined Langley in 1964 as a co-op student and retired in 2004 an internationally respected climate scientist.

I've won some awards. 'Time' magazine designated me as one of the environmental heroes of the 20th century. Oh, and I've got some honorary citizenships, like from the Conch Republic of the Florida Keys. But the one thing I am proud of is I didn't get the Chevron environmental award. Never did get that one.