Successful movements also need an organisational model that allows them to keep growing.

I might find myself standing, transfixed, by the roadside, watching a sparrowhawk hunting among the bushes, astonished that other people could ignore it. But they might just as well be wondering how I could have failed to notice the new V6 Pentastar Sahara that just drove past.

Immense wealth translates automatically into immense environmental impacts, regardless of the intentions of those who possess it.

Places that have become agricultural deserts, trashed by giant corporations, could be reforested, drawing carbon dioxide from the air on a vast scale. The ecosystems of land and sea could recover, not just in pockets but across great tracts of the planet.

I swim every other day. That's my exercise.

Let me ask you a question: If you never ate a balanced diet, what would happen to your body? You know the answer: Eventually you'd grow weak; you might even open yourself to serious illness or disease. We all need a balanced diet if we are to stay healthy.

I have to be very aware of how I manage my health. I still have relapses if I push myself too hard and my immune system can't handle it.

Recent demonstration projects have shown that with some Federal support, a little funding can go a long way toward ensuring that low-income children have access to good oral health care.