Many ideas have struggled over the centuries to dominate the planet. Fascism. Communism. Democracy. Religion. But only one has achieved total supremacy. Its compulsive attractions rob its followers of reason and good sense. It has created unsustainable inequalities and threatened to tear apart the very fabric of society. More powerful than any religion, it has reached into every corner of the globe. It is consumerism

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.

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

I think we will work our way towards a position that says that having more than two children is irresponsible.

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

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.

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