Why does "green energy" cost so much?

For two years, the city of Durango, Colo., bought electricity for all its government buildings from wind farms. The City Council ended that program this year, reverting to electricity derived from coal-burning plants and saving the cash-strapped city about $45,000. Solar cost $175 per megawatt Wind =... show more For two years, the city of Durango, Colo., bought electricity for all its government buildings from wind farms. The City Council ended that program this year, reverting to electricity derived from coal-burning plants and saving the cash-strapped city about $45,000.

Solar cost $175 per megawatt
Wind = $91
Nuclear=$73
Coal=$64

Why does it cost so much?
Update: http://www.dailyrecord.com/article/20090504/UPDATES01/905040340
15 answers 15