Prop 22 is expected to put more cars on the road, which is particularly concerning because a recent study found that Uber and Lyft were responsible for about half of San Francisco’s increase in congestion between 2010 and 2016. Transportation is also the largest contributor to U.S. greenhouse gas emissions. Allowing these companies to expand without giving workers’ the ability to organize is a huge obstacle to the fight for a just and carbon-free transit sector.