Burger King is making an unexpected step to attract consumers these Olympics weeks, aiming to battle with its major rival, McDonald’s, the official sponsor of the London 2012 Games. The chain’s ‘Flameship’ venue in Leicester Square has been turned into a gallery of one masterpiece as the company’s is displaying ‘Flame Grilled’ work by big-name artist Damien Hirst at least until the end of the year, but not for ever, according to Marketing.

McDonald’s, which is often blamed for promoting unhealthy meal choices, is doing its best clearing its image by improving food standards and adopting greener choices in its business. The biggest fast-food chain in the world has issued the 2012 Global Best of Green report, which highlights 90 examples of its environmental best-practice innovations. The 46-page illustrated report is spanning across eight categories—energy, packaging, anti-littering, recycling, logistics, communications, green building, and greening the workplace—and tells about the company’s achievements in each of them.