Post Carbon Fellow Bill McKibben took part in this Q&A on Rio+20 in the New York Times.
From the article:
Bill McKibben is an environmental activist, professor, author and the founder of 350.org, an international organization fighting climate change.
In 1992, 12-year-old Severn Cullis-Suzuki gave a speech at the Rio Earth Summit demanding action on global sustainability from the adults. Twenty years on, did the adults fail her?
Yep. The first Rio conference was hopeful, but it would have taken real courage from leaders to make that hope real. It would have meant standing up to the fossil fuel industry. Almost none of them turned out to have that courage.