Why wind power does not deliver the expected emissions reductions

Debate has raged for decades on the role of carbon dioxide in climate change. It is often assumed that renewable energy technologies, because they are not powered by fossil fuels, will reduce CO2s contribution to overall energy use. The unspoken hypothesis is that having these technologies replace coal, oil and natural gas will gradually lower the ambient level of CO2, and thus alleviate or even eliminate possible climate change. However, a number of studies suggest because of the intermittent nature of some renewable technologies, CO2 reduction will be less than presently anticipated by their proponents.