We have the most crude accounting tools. It's tragic because our accounts and our national arithmetic doesn't tell us the things that we need to know.

I was recently looking at what they can actually do to reduce consumption of petrol. It would be quite possible to build automobiles out of carbon fibre that would be just as strong, weigh 10 times less and consume 10 times less petrol.

The Sierra Club in the United States has now really come out for population control and reduction.

If the economy becomes disembodied from society it can only lead to disaster.

Now we are flying off into outer space, there is no clear curb on what can be done in the name of the economy.

I used to work a lot on food issues and every time somebody predicted that production would be inadequate they got egg on their face a year or two later.

We're trying to run a 21st century society and economy with 19th century Darwinian, competitive, crude ideas.