The reality is that in recent years, greenhouse gas emissions from cars, trucks, boats, trains, and planes have failed to decline in California. In fact, they’ve actually gone up.
That’s an ominous sign because transportation is the biggest greenhouse gas polluter in the state, accounting for more than 40 percent of statewide emissions. And that doesn’t count greenhouse gases from biofuels like ethanol, biodiesel, and renewable diesel, which aren’t included in the air board’s inventory.
Although 2017 saw the smallest increase in transportation emissions since the last time they dipped in 2013, the sector is headed in the wrong direction — largely driven by passenger vehicles like cars and SUVs.