Here’s another take on the need for a new approach to combat climate change. It is based on the Kaya Identity – not, as you might think, a novel by Robert Ludlum, but a simple equation that gives some very useful insights into the factors that determine levels of global greenhouse gas emissions.
Basing their alternative ideas on this equation, Gwyn Prins and 12 colleagues explain How to get climate policy back on course (pdf here). It needs to be put back on track because, as Prins and colleagues put it, the existing policy approach (based on carbon markets) is an “abject failure” (p.4).
The Kaya Identity suggests that there are four – and only four – macro-scale policy levers that are available for making emissions reductions and each of the four levers suggests a particular approach to policy: