Changing to renewable diesel allowed us to immediately reduce emissions from our entire fleet, rather than making a series of small improvements as we replace vehicles one at a time. Western Contra Costa Transit Authority ( WestCAT ) , a public transit service in California , has switched its entire fleet of 45 heavy duty buses from regular diesel to Neste MY Renewable Diesel . WestCAT operates 365 days a year , serves more than 65,000 residents within a 20 square mile service area , and carries more than 1.3 million passengers annually . Neste MY Renewable Diesel , which cuts carbon dioxide emissions by up to 80 % , is a drop - in alternative to petroleum diesel and is distributed via the same transportation infrastructure .
Western Contra Costa Transit Authority ( WestCAT ) , a public transit service in California , has switched its entire fleet of 45 heavy duty buses from regular diesel to Neste MY Renewable Diesel . WestCAT operates 365 days a year , serves more than 65,000 residents within a 20 square mile service area , and carries more than 1.3 million passengers annually . Neste MY Renewable Diesel , which cuts carbon dioxide emissions by up to 80 % , is a drop - in alternative to petroleum diesel and is distributed via the same transportation infrastructure .