"I have problems seeing this in the US - it isn't a country where you can start with an unproven technology," he says. "To have technologies proven there, you need revenue streams that are high enough that you can afford some margin for risk. For this reason, we are looking to developing nations as a first site."
Solar power looks to catch the updraft
German engineers are scaling up designs for a striking renewable-energy technology known as the 'solar updraft tower', with plans to bring their 30-year-old concept to the developing world
5 March 2010 10:16 GMT
Updated
8 January 2013 10:36 GMT
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