Solar, hydroelectric, and wind power are cheaper than coal in some parts of the world.
Cheaper, but not all year around
But, solar is likely to become more cost-efficient to coal everywhere by 2025, Bloomberg reports. Since 2009, the price of energy production by solar panels has dropped by 62%. In 2016, solar energy could be produced at the price of 3 cents a kilowatt-hour, that is, half the cost of coal. Chile broke the 3 cents barrier in August 2016.
Scale is key
Prices are expected to de...
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