It's very important that there should be cross-fertilisation between government and academia. Both parties can benefit from having a better understanding of how the other works.

I've never really had much of a career plan, and interesting opportunities kept cropping up.

Science and policy-making thrive on challenge and questioning; they are vital to the health of inquiry and democracy.

Enlightened self-interest from those involved in hydrocarbons should lead to the support of technologies enabling the clean use of hydrocarbons, such as carbon capture and storage, and not to the defence of deniers and cranks.

For millions of Americans, climate change is no longer just a chart or a graph. It's the smoke on our tongues from massive wildfires. It's the floodwater invading our homes and record-breaking hurricanes and heat waves.

Ah, to be a conservative climate change denier. While real scientists must do all the research and engage in heated debates about just how bad things are going to be, the deniers can rest easy in the bliss of willful ignorance.

If managed well, urbanization can create enormous opportunities: allowing innovation and new ideas to emerge, saving energy, land and natural resources, managing climate and the risk of disasters.

It is a world of extremes, which can be characterised most clearly in terms of exclusion. That means political exclusion, whereby the rights of citizens are marginalised by the interests of big business: George W Bush's environmental policy, for example, is clearly formulated in the interests of U.S. energy companies.