$ 0 0 University of California scientists have a new way to demonstrate which neighborhoods returned to pre-pandemic levels of air pollution after COVID restrictions ended. Calais Document Category: EnvironmentTopics: Climate ChangeClimate change policyGreenhouse gasLow-carbon economyUniversity of CaliforniaLocation: Los AngelesSan FranciscoRiversidePasadenaOrangeSocial Tags: Greenhouse gas emissions by the United StatesClimate forcingGlobal Warming Pollution Reduction ActClimate forcing agents