Wind to be cheapest source of power, says Exxon

Yes, Exxon. One reason is that once installed, wind has no fuel costs (the same is true for solar, geothermal, and hydro) while coal, gas, and nuclear do. Over time, this cuts costs dramatically.

However – and this is a big However – this chart from ExxonMobil notes at the bottom that their wind and solar projections do not include the costs of an upgraded grid and energy storage. Both of these are essential for renewable energy to be effective at grid-scale.

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