The 'Big Green Debate' has entered a very interesting stage. Once there was endless controversy; now there is near unanimity. Once there was universal political indifference; now the bandwagon is abrim with politicians in catch-up mode. Once the media were semi-detached: now they're really getting stuck in. And they need to be! Many people are confused and disempowered, and the role of the media in getting then informed and engaged is critical

Absolutely love the new campaign from the Optimum Population Trust: do your bit for addressing climate change by having fewer children - or even no children. The lifetime CO2 emissions of a UK citizen amount to 750 tonnes (the equivalent - apparently - of 620 return flights between London and New York), so the extra 10 million by which our population will rise between now and 2074 will, over their lifetimes, emit around 7½ billion tonnes of CO2..."births averted" is probably the most single most substantial and cost-effective intervention that governments could be using

We desperately need some new thinking today about systems of global governance. We're stuck with the same obsolete, ignore-the-earth institutions that were brough into being after the 2nd World War, and they're now failing us ever more catastropically. Wild Law shows just how radical we now need to be in creating new institutions that are genuinely 'fit for purpose' in the 21st Century.

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.

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

Fundamentally transforming the foundations of the economy is the biggest contribution we can make towards building a sustainable future. The current economic crisis may be painful, but it will be nothing compared with the crises we will face if we continue to grow in a way that threatens the life-support systems on which we rely

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