A first of its kind renewable gas facility opened on O'ahu Wednesday.

The plant is connected to the City's Hono'uli'uli Wastewater Treatment facility and is managed by Hawaii Gas.

The purpose is to turn sewage into energy and hopefully eliminate the need for nearly 15,000 barrels of oil per year.

"Today is a huge milestone because we want to do more renewable natural gas," CEO of Hawai'i Gas Alicia Moy said.

"In a way, we all of us are making some of that gas and now it's being used to save our planet and make it a lot bluer and greener and sustainable," Mayor Kirk Caldwell said. 

The plant is the result of a partnership between the City and Hawai'i Gas.