Centre For Local Research into Public Space (CELOS)
If enough green power was available for purchase, the cost of purchasing 25% of the City’s electricity requirements from green power sources would range, depending on the type of green power purchased, from $6.17 million to $13.57 million annually for City Divisions and $3.34 million to $7.34 million annually for the City’s ABCs, for a total cost ranging from $9.51 million to $20.91 million, which would represent an overall increase of 7.0 to 16.0 percent of the City’s electricity cost.
City Electricity Purchase Strategy - Green Power (city website; see local copy)