certain … not so certain

question_marksBecause in just 100 months’ time, if we are lucky, and based on a quite conservative estimate, we could reach a tipping point for the beginnings of runaway climate change.

That said, among people working on global warming, there are countless models, scenarios, and different iterations of all those models and scenarios, said Andrew Simms, policy director and head of the climate change programme at the New Economics Foundation.
The Guardian, 1 Aug 2008