I think President Obama could have handled politics and policies differently. But he has been decisive, strong, and consistent - important qualities in a president. Mitt Romney is indeed an Etch A Sketch, the antithesis of leadership.

I don't like politicians who vacillate.

The world has conducted a massive macro-economic experiment since the cataclysm of 2008. In Europe, the fans of austerity have had their chance, and the results have been a disaster.

Why does it have to be politics? Is there a dynamism to that world and a theoretical capacity to do things that draws many talented people? Absolutely. Are there other ways to be involved and lead an interesting life? Of course.

The pace of global warming is accelerating and the scale of the impact is devastating. The time for action is limited - we are approaching a tipping point beyond which the opportunity to reverse the damage of CO2 emissions will disappear.

Some say that I should settle down, go slower and not push so hard, so quickly for such transformational change. To them, I say that you misunderstand the size of the problems we face, the strength of the status quo and the urgency of the people's desire for change.

Those who are critical of Alliance are the same people who have done nothing for 30 years.