<P> As of March 2017, the EPA budget have been severely impacted the condition of environmental education . The 2018 United States federal budget cut approximately $2.5 billion from the roughly 8 billion annual budget for EPA, and the budget for environmental education was cut from $8.7 million to $0.555 million, which is reduced by 94% . </P> <P> California's air is the most polluted in the U.S.A. </P> <P> Los Angeles has the most contaminated air in the country . With a population of roughly over 10 million, the Los Angeles area is a large basin with the Pacific Ocean to the west, and several mountain ranges with 11,000 - foot peaks to the east and south . Diesel engines, ports, motor vehicles, and industries are main sources of air pollution in Los Angeles . Frequent sunny days and low rainfall contribute to ozone formation, as well as high levels of fine particles and dust . The strong relationship between AQI and ozone levels may be found on air pollution maps . </P> <P> Air pollution in Los Angeles has caused widespread concerns . In 2011, the Public Policy Institute of California (PPIC) Survey on Californians and the Environment showed that 45% of citizens in Los Angeles consider air pollution to be a "big problem", and 47% believe that the air quality of Los Angeles is worse than it was 10 years ago . In 2013, the Los Angeles - Long Beach - Riverside area ranked the 1st most ozone - polluted city, the 4th most polluted city by annual particle pollution, and the 4th most polluted city by 24 - hour particle pollution . </P>

Which area in the united states has the most serious urban smog problem