The American Wind Energy Associations claims that there was more than 12GW of wind capacity under construction at the end of 2013, with nearly 11GW entering construction in the final quarter of the year alone.

The “worst-case scenario” of a 50% attrition rate on that figure is unlikely, but “I’d bet you’ll see at least a 30% fall out”, says Duncan Koerbel, the Denver-based chief technology officer for India’s Suzlon Group.

Koerbel