On the roof of the Two Twenty building in Saskatoon, Saskatchewan are 90 solar modules comprising a 27.5 kilowatt solar system, the very first project built by the newly-formed SES Solar Co-operative. The co-op is an offshoot of the Saskatchewan Environmental Society (SES) that works on conservation, sustainability and yes, energy issues. In fact, in its early days the SES fought the construction of a dam on the Churchill River. The society offices are in the Two Twenty building, a co-working space for social innovators in Saskatoon.