The San Francisco Bay Area Water Emergency Transportation Authority recently welcomed back into service the 225-passenger M/V Pisces following its conversion to cleaner engines. The new engine update is expected to lower harmful air emissions by 80%, according to WETA. M/V Pisces is the first of four Gemini-class ferries in the WETA fleet to be outfitted with cleaner engines under the WETA Board of Directors’ decision last September to authorize $5.5 million toward the retrofitting effort, thanks to funding from the Bay Area Air Quality Management District’s Carl Moyer grant program and revenue from Alameda County transportation sales tax Measure…