Dr. John Constable is the Director of the Renewable Energy Foundation (REF) an independent UK charity that publishes data and analysis on the energy sector .  Dr Constable has been working in energy policy since 2004 and is known for his data-grounded view that current policy targets for renewables are infeasible, unaffordable, and almost certainly counterproductive.  We will hear more about the debate surrounding the REF’s study that showed turbine performance deteriorating much more quickly with age than that claimed by the wind industry.   The study was authored by Dr. Gordon Hughes.Dr Gordon Hughes is a Professor of Economics at the University of Edinburgh where he teaches courses in the Economics of Natural Resources and Public Economics. He was a senior adviser on energy and environmental policy at the World Bank until 2001. He has advised governments on the design and implementation of environmental policies and was responsible for some of the World Bank’s most important environmental guidelines.  Naturally the wind industry is not taking this news well… For example, Windpower Monthly printed  ”No big drop in performance as turbines get older” by David Milborrow.  David Milborrow makes money as a technical adviser to the journal WindPower Monthly and to the BWEA and has an undergraduate degree in Mechanical Engineering from City University GB.