Today openDemocracy publishes the first part of a dialogue between activists in India, China and Brazil on what to do about climate change. Read it here.

Cliff Polycarp from India, Rubens Born and Mark Lutes from Brazil and "Angel Green" from China share some serious thinking on activism in their own countries. The results may surprise you.

Brazil, India and China contain not a long way short of half the world's human population. They are three of the most dynamic economies, two of its most ancient centres of civilisation and three of its most vibrant cultures.

As far as we know, no one has tried a dialogue like this before. If openDemocracy can make any claim to a truly global debate on the politics of climate change, this would be first witness in our defence.

"Angel's" real name and that of her organisation have been withheld. This is because we have "democracy" in the title the debate, and we don't want to risk any trouble for her. In this case, the "open" bit has been put aside.

The second part of the dialogue goes up tomorrow.

But even both parts together hardly begin to scratch the surface of the issues . Even four such remarkable individuals cannot do that in this wee space .

It would be great to see further relevant discussion in the forum of the political challenges for the global South (large countries and small). If you do join the debate please cite verfiable evidence for your argument and, please, use your real name unless to do so threatens your livelihood or security.

Thank you

Caspar Henderson