, Columnist
The Next Big Renewable Fuel? Accountants
More companies are doing long-term deals with green-energy suppliers.
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What's the most important innovation behind the rise of renewable energy: Taller wind turbines? Smart power grids? Spray-on solar cells?
None of the above. For all the advances made by engineers that cut the cost of solar modules and new wind generation by more than half in five years, the true heroes of the renewables revolution may be a group that's rarely recognized: accountants.