If something is sustainable, it means we can go on doing it indefinitely. If it isn't, we can't

A combination of very rapid population growth over the last 50 years and reckless economic growth during the same time has stored up massive problems for societies the world over. No nation is immune. The scientific evidence tells us all we need to know: carry on with business-as-usual growth-at-all-costs, and we're stuffed

We are now running out of time, and the question now is not what is happening to the climate, but how bad will it be before the world starts doing enough?

I am unapologetic about asking people to connect up their own responsibility for their total environmental footprint and how they decide to procreate and how many children they think are appropriate.

The World Health Organization recently published some data showing that each overweight person causes and additional one tonne of CO2 to be emitted every year. With one billion people overweight around the world-of whom at least 300 million are obese-that's an additional one billion tonnes.

The huge arrogance of the companies developing GMO crops and their determination to destroy the line of accountability which links the developer to the product is breath-taking. When something goes wrong, as it inevitably will, there will be a great benefit to those who have taken a stance against genetically modified organisms.

Any regeneration project that fails to put environmental and social benefits at its very heart is unlikely to achieve anything more than a very short-lived spasm of spurious prosperity