Wyoming buried 1,124 wind turbine blades in a landfill outside Casper after cutting each one into three pieces. A Missouri plant near St Louis has since found another route, processing the same material into cement feedstock and kiln fuel at a rate of roughly 250 blades a month.
The two approaches sit at the centre of one of renewable energy's most discussed but least resolved problems: what to do with a wind turbine blade once it stops turning.
