Healthy fast food restaurant to power its stores using clean energy

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U.K. restaurant chain LEON has announced that it is using 100 percent renewable energy across all its stores.

The business has chosen a renewable energy tariff from Opus Energy, which sees more than 30 sites use 100 percent "renewably sourced energy."

"We are a company driven by positivity and purpose," Kirsty Saddler, LEON's director of marketing, said in a news release. "We constantly challenge ourselves to see if we can do better and moved to a 100 percent renewable energy contract, even though it wasn't the cheapest offer on the table. We are determined to invest in the future, rather than just the bottom line."

A founding member of the Sustainable Restaurant Association, LEON opened its first restaurant in 2004 and describes its menu offering as "naturally fast food."

LEON is the latest business to move to a cleaner, more sustainable operation. In May, global food manufacturing firm Mars signaled its green credentials when it announced its U.K. operations would be completely powered by renewable electricity, while tech giant Apple says that 93 percent of its energy came from renewable sources in 2015.