Meanwhile, extensive environmental damage is being done to the fragile mountaintop environments where wind towers are being built, they said. Hartwell said aerial photos taken by Benning showed huge swaths of trees were cut down along the Lowell Mountain ridge line, where Green Mountain Power recently built 21 turbines.
Trees absorb carbon, and "the forest is the single biggest carbon sink we have," Hartwell said.
The Vermont Natural Resources Council was among several groups defending wind power development in the state.
"VNRC believes that carefully sited renewable energy generation facilities — including wind turbines — coupled with aggressive energy conservation and efficiency strategies, are a responsible response to climate change, peak oil and the need for an independent, clean energy economy," it said in a statement.