I grew up playing with kids who were the kids of people my parents grew up playing with, and they know me like nobody else. I thought everybody was that way when I was growing up, and then I left to go to college, and I realised that the world is full of strangers.

The wood of any tree growing anywhere records fairly faithfully the oxygen and hydrogen chemistry of the water the plant has access to through precipitation.

There is a fundamental and culturally learned power imbalance between men and women, and it follows us into the workplace. The violence born of this imbalance follows us also. We would like to believe that it stops short of following us into the laboratory and into the field - but it does not.

The type of science that I do is sometimes known as 'curiosity-driven research.' This means that my work will never result in a marketable product, a useful machine, a prescribable pill, a formidable weapon, or any direct gain.

Clearly, there have been changes in the climate.

I think dealing with climate change should be a centerpiece of any campaign in the 2020 election cycle. Yet I'm the only one with a bipartisan carbon tax bill.

I like the outdoors and the natural world. Environmental issues.

I am on the board of corporations who contribute both to environmental problems and their solutions. And I am on the NGO side: the Earth Council and other organizations.