The court ruled Thursday that the Public Service Commission properly approved Florida Power & Light's $881 billion rate hike in 2016.
The Sierra Club challenged the PSC's rate hike approval, saying FPL's didn't consider renewable energy options like solar when it decided to upgrade natural gas-powered plant. Part of the rate hike was to pay for the construction of a new gas plant.
Sierra Club argued FPL's plans were "unreasonable, unnecessary, and more expensive than renewable alternatives" and said the commission wasn't acting in the best public interest.
FPL has about five million customers in Florida.
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