I found this article most interesting. I have waited many years for solar energy to come into its own. At the moment all I have enjoyed is garden solar lights. It would be great to see something more practical happen. Of course it all takes time and I have heard that for 40+ years.
Anyway here is a taste of the article and the link:
NEW YORK (CNNMoney) -- About two-thirds of the one million rooftops in New York City are suitable for solar power. If every one of those roofs had solar panels, when the sun shines the brightest the city could get half its electricity from solar power. http://money.cnn.com/2011/07/25/technology/solar-new-york/index.htm?iid=HP_River