Despite low oil prices, the latest figures reveal a striking turnaround in solar and wind power investment, but are we really about to win the carbon war?

Are we tipping the right way? One of the great environmental stories is of how catastrophe can creep up and be noticed only when it is too late to act. Examples range from the sudden, inexplicable collapse of bee colonies, to ice cores revealing the potential for dramatic climatic upheavals that happen not in millennia or centuries, but the time it takes to pass through a coalition government or two.

It is hard enough to identify tipping or “inflection” points when you are consciously looking, like monitoring the so-called known unknowns of future forest die-back, deep-sea methane release, ice melt and sea level rise. Worse, in complex systems, are the unknown unknowns. All you have is nebulous worry. It’s why we are supposed to obey the precautionary principle relating to any activity which at scale is capable of altering whole systems.

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