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

Peace, non-violence, human rights and the environment - if only everybody saw these as the seamless whole that they are

The future will be green, or not at all. This truth lies at the heart of humankind's most pressing challenge: to learn to live in harmony with the Earth on a genuinely sustainable basis.

The future will be green, or not at all

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

We're never going to scare people into living more sustainably! We have to be able to demonstrate just how dynamic and aspirational such a world could be

Keeping people on side is a precondition of making any progress on sustainability issues

Climate change is not an environmental issue, but much more to do with security and economics

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.

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?

Humankind's greatest priority is to reintegrate with the natural world.

No pessimist discovered the secrets of the stars or sailed to an uncharted land or opened a new heaven to the human spirit

The measurement of human ability is in an infant state. Was it a requirement for the Wright Brothers to hold PhD’s before they could invent and take flight?

In fact, because of their connection to the land, farmers do more to protect and preserve our environment than almost anyone else. They are some of the best environmentalists around.

Perhaps," he said, "we should discuss our arrangements, then.

The greatest challenge Internet users face is information overload.

The belief that married-couple families are superior is probably the most pervasive prejudice in the Western world.

Edmonton is Canada's answer to Omaha. Solid, unassuming, and surrounded by a whole lot of nothing. It's a place that makes you think of sensible shoes.

The triumph of anything is a matter of organization.

Fear is the mother of all gods ... Nature does all things spontaneously, by herself, without the meddling of the gods.

The Bible, however, was not created to be amended and altered with each passing culture.