"Climate change is the most important issue we face", says Tony Blair. Why, then, has it not featured in the UK general election campaign?. The question has been debated in several places on openDemocracy, including here.

Today, openDemocracy reveals all with election week responses by the major political parties. Well, OK, not all, but whatever spin the party spokespeople want to put on this issue at the last minute.

More revealing, perhaps, is openDemocracy's new roundtable between activists on why they think the politics of climate change has failed so far, and what to do about it.

For fifteen years, says one, environmentalists have been pursuing a tried-and-tested model for social change: "Our call to action has been made against a backdrop of serious warnings from scientists. And yet there is still no vocal mass movement against climate change in any country. Where are we going wrong?"

For more on this, go here.

Caspar Henderson