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We do enjoy challenges on One Planet, so Mike gets one to celebrate the show's first birthday - to brew the team a cup of tea during the programme's recording, but using solar power, rather than mains electricity. Have a listen to see how he gets on.

The show also sets a challenge for you. Tell us what you want multinational corporations to do when it comes to being green. We offer a couple of case studies to get the thoughts flowing. First we head to the Amazon forest in Peru, where food giant Nestle are funding the planting of hundreds of thousands of trees. Then we hear from a mountain in America, where a data storage centre is trying to turn their energy hungry business a little greener.

Plus - following all your comments last week on capitalism and the environment - we meet up with a leading venture capitalist who's investing heavily in green tech. As ever, let us know your thoughts. Join in the conversation on our Facebook page, the link's below. Or email the team at oneplanet@bbc.com. Alternatively, send us a postcard, they always cheer Mike up. The address is One Planet, 大象传媒 World Service, Bush House, London, UK.