By including such data in their computer simulations, climate modellers may be able to tell whether solar inconstancy deserves some of the blame heaped on greenhouse gases.
At the same time, consumers got an extra bill to support wind farms that, because of the inconstancy of the wind, operate at 25% of their capacity (figure from the British Wind Energy Association) or 8% (according to E.on, a large operator of UK wind farms).