Alex Alexiev, Chairman of the Center for Balkan and Black Sea Studies: There are at least three problems with renewable energy (wind and solar), which are not surmountable. First, it is intermittent i.e. not reliable. Secondly, renewable energy depends on government subsidies and is not feasible without them. Third, the efficiency of solar and wind tech, despite being heavily subsidized, is rapidly approaching the limits of physics, which means that there are no great efficiency improvements to be expected.The renewable energy emperor has no clothes and it won’t be long before everyone can see it.