California fleets achieved carbon negativity in 2020 thanks to bio-CNG

In California, Natural Gas Vehicles for America (NGVAmerica) and Coalition for Renewable Natural Gas (RNG Coalition) announced that California fleets fueled with bio-CNG achieved carbon-negativity for calendar year 2020.

Ninety-two percent of all on-road fuel used in natural gas vehicles in California last year was renewable natural gas (RNG). According to data from the California Air Resources Board (CARB) the annual average carbon intensity score of bio-CNG in that mix was -5.845 gCO2e/MJ.

Moreover, the carbon intensity of California’s bio-CNG continues to drop. Data from Q4 2020 puts the carbon intensity average of bio-CNG at -26.11 gCO2e/MJ, down from -0.85 in Q2 and -17.95 in Q3.