Dozens of protesters took to the streets outside of Gov. Deval L. Patrick’s Springfield office on Saturday, calling for tougher clean air rules, retirement of the Mt. Tom coal-burning power plant and for opposition to proposed biomass plants in Western Massachusetts."It’s simple &38211 clean energy does not come out of a smokestack," said Jesse Lederman, spokesperson for Stop Toxic Incarceration in Springfield. "The proposed biomass plants in Greenfield and Russell were cast down by their citizens, and the Springfield plant was opposed by a majority of the City Council. So why is Gov. Patrick continuing to cave to the timber industry and not standing up for the people who elected him?"