May 18, 2012
Los Angeles County Metropolitan Transit Authority (Metro) has retired the last diesel bus in its fleet, becoming the world's first major transit agency to operate only clean fuel buses - nearly 100 per cent of which operate on compressed natural gas (CNG). According to Metro, compared with diesel buses, its CNG fleet reduces cancer-causing particulate matter by more than 80 per cent. And, because of the switch from diesel to CNG, Metro avoids emitting nearly 300,000 pounds of greenhouse gas emissions per da