In pictures: Ethical Man's US odyssey

In February, Newsnight's Ethical Man Justin Rowlatt embarked on a low carbon emission trip across the US. In Detroit he tried hitchhiking - and nearly got arrested in the process.

In the Pennsylvania backwoods, Justin made a pitstop to visit green pioneer Joe Jenkins, author of "The Humanure Handbook", the world's first guide to composting your own poo.

On a 48-hour train journey to Dallas, Justin made many friends, including this Amish man who taught him how to play dominos.

Justin also met Hollywood actress and green activist Daryl Hannah on the train. When they met up again in Los Angeles she arrived in her hemp oil-fuelled car.

Justin made sure he looked the part when he reached Texas - one of the most polluting states in the United States.

Justin went out on horseback with a cowboy, also called Justin, near the town of Sweetwater, to see how this Texas backwater has become the centre of a clean energy revolution.

In Sweetwater, Justin found a forest of wind turbines growing up among the pump jacks and pipelines of the oil state.

Sweetwater is not only the centre of the Western hemisphere's leading wind power generation region - it is also home of the world's largest rattlesnake round-up.

While looking for solutions to climate change, Justin also got lucky in his search for the mythical Jackalope.

Reaching Nevada, Justin met an unlikely green hero - Bob Combs, Las Vegas' only pig farmer and one of the state's leading food recyclers.

In California, Justin met workers from the weather-proofing industry. It is hoped that "weatherizing" will help lift America out of recession, reduce foreign energy dependence and help tackle global warming.

Watch the final Ethical Man film on Newsnight on Wednesday 24 June, 2009 at 10.30pm on BBC Two.

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