costs for wind and solar plummet http://www.vox.com/2015/2/5/7977869/wind-solar-costs-falling http://www.vox.com/2015/2/5/7977869/wind-solar-costs-falling lower costs http://www.vox.com/2015/2/5/7977869/wind-solar-costs-falling getting cheaper all the time in 2016 Vox costs for wind and solar plummet the price of both has been tumbling reached record lows