A foreign visitor struggles with Beijing's air pollution
Walking across the US for 22 years and refusing to speak for 17 years, he wanted to make a personal protest about an oil spill in San Francisco Bay.

His concern for the environment is shared by a Hollywood actor who has made green living a life-long journey.

On the Riz Khan show John Francis talks about his "Planetwalk" across the America's and his vow of silence. 

What real impact did he have and what did he learn from his journey?

Joining him on the show is Ed Begley Junior, a Hollywood actor who has appeared in more than 35 movies. 

He has been an environmentalist for more than 30 years and his book Living Like Ed - A guide to the Eco-Friendly Life provides everyday advice on going green. 

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This episode of Riz Khan aired on Monday, May 19, 2008

You can watch Riz live at 1900GMT, with repeats at 0030GMT, 0500GMT, and 1000GMT.

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