The medical literature tells us that the most effective ways to reduce the risk of heart disease, cancer, stroke, diabetes, Alzheimer's, and many more problems are through healthy diet and exercise. Our bodies have evolved to move, yet we now use the energy in oil instead of muscles to do our work.

My Prime Minister regards the economy as our highest priority and forgets that economics and ecology are derived from the same Greek word, oikos, meaning household or domain. Ecology is the study of home, while economics is its management. Ecologists try to define the conditions and principles that enable a species to survive and flourish. Yet in elevating the economy above those principles, we seem to think we are immune to the laws of nature. We have to put the ‘eco’ back into economics.

I can't imagine anything more important than air, water, soil, energy and biodiversity. These are the things that keep us alive.

We are upsetting the atmosphere upon which all life depends. In the late 80s when I began to take climate change seriously, we referred to global warming as a "slowmotion catastrophe" one we expected to kick in perhaps generations later. Instead, the signs of change have accelerated alarmingly.

In the environmental movement, every time you lose a battle it's for good, but our victories always seem to be temporary and we keep fighting them over and over again.

Our personal consumer choices have ecological, social, and spiritual consequences. It is time to re-examine some of our deeply held notions that underlie our lifestyles.

Humans are now the most numerous mammal on the planet. There are more humans than rats or mice. Humans have a huge ecological footprint, magnified by their technology.