http://www.ft.com/cms/s/0/2ffd1d02-0ee0-11e1-b83c-00144feabdc0.html#ixzz1fZHnCoq2

The price of solar falls by a fifth every time capacity doubles, the association adds. As capacity is ramped up in sunnier parts of the world, costs will continue to fall and government support regimes should be a thing of the past.

However, given International Energy Association estimates that fossil fuel subsidies currently total more than $400bn, six times the amount of support for clean energy, this may be wishful thinking.