A very interesting video on an important subject.
About Johan Rockstrom:
Johan Rockstrom is a leader of a new approach to sustainability: planetary boundaries. Working with a team of 29 leading scientists across disciplines, Rockstrom and the Stockholm Resilience Centre identified nine key Earth processes or systems — and marked the upper limit beyond which each system could touch off a major system crash. Climate change is certainly in the mix — but so are other human-made threats such as ocean acidification, loss of biodiversity, chemical pollution.