To begin with, I've always known that I was a little bit different. And, I have a lot of relatives who own farms. I grew up in the American South where political issues and issues of justice were at the forefront. What I do now is a combination of all these factors.

The drive behind what I do is really to make sure that people don't go to bed hungry. It's not just that I have a love of diversity, it's the importance of the uses of that diversity.

Perhaps it matters little whether the international community chooses to celebrate crop diversity, but it profoundly matters that the international community takes action to conserve it.

To many people, 'biodiversity' is almost synonymous with the word 'nature,' and 'nature' brings to mind steamy forests and the big creatures that dwell there. Fair enough. But biodiversity is much more than that, for it encompasses not only the diversity of species, but also the diversity within species.

Like every other viable environmental policy, the search for clean energy begins at home.

Our message to leaders from every continent was simple: California has succeeded on climate and clean energy because we've emphasized local, human values and built a coalition that includes community and environmental leaders, working families, and communities of color - as well as unions and progressive business.

I think the environmental movement has failed in that it's used the stick too much; it's used the apocalyptic tone too much; it hasn't sold the positive aspects of being environmentally concerned and trying to pull us out.

On the environment and climate change, I suspect that future generations will think there was too much timidity, too much fear of upsetting business. Basically, New Labour was very nervous about regulating business, or requiring it to do anything, even when there was a very clear social or environmental case for doing so.