In the last two years, the amount of days where ozone levels have exceeded federal standards is increasing. From 113 days in 2015, to 130 in 2016, and 145 in 2017. Los Angeles already claims some of the worst air quality in the United States, and with the threat of a gradually warming planet, the presence of ozone will only increase. One of the most impactful actions in decreasing ozone would be to minimize emissions from diesel engines, in short, taking diesel trucks of the road and replacing with trucks that use natural gas or electricity. While folks like Elon Musk work on making electric trucks a commercial reality, greater efforts need to be made in incentivizing gas engines over diesel.
When it comes to a city like Los Angeles, the activity of the port and commercial transport on diesel trucks are large targets for emissions reductions. This involves local business and trade departments, automakers, distribution companies, and perhaps a Sustainability and/or Mayor’s Office.
The first step would be to halt the future production of diesel trucks. Local governments could also decrease sales tax on trucks using natural gas or alternative energy, and increase sales tax on the sale of diesel trucks. And the same for the sale of diesel versus natural gas at the pump. Like Paris, LA could prevent trucks with diesel engines from entering city limits, or the ports (by a sort of labeling system).