What is the air quality in Los Angeles?
21515767#5
Although Los Angeles remains the city with the worst ozone pollution, the state of air pollution has been improving. 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, Los Angeles is particularly susceptible to high ozone levels. 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 Air Quality Index (AQI) and ozone levels may be found on air pollution maps.
Pollution in California
21515767#6
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. The most recent PPIC Survey of 2018 showed that the strong majority of California adults (72%) and likely voters favor the new state law mandating reductions in greenhouse gas emissions, and 56% of adults support the state's cap-and-trade program. In addition, about half of Californians believe state climate policies will lead to more jobs, while the other half expects the price of gasoline to rise. In 2013, the Los Angeles-Long Beach-Riverside area ranked as 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.
Pollution in California
47523622#23
Air pollution, or suspended particulate matter locally generated from the increased number of automobiles in the area, from point sources such as factories, dust carried into the air by construction activity, and the contribution of similar pollutants from the Los Angeles area has regularly caused the Inland Empire to be at, or near, the bottom of many air quality ratings. In 2004, the EPA rated the San Bernardino-Riverside area as having the worst particulate air pollution in the United States (although the San Joaquin Valley in central California had the worst overall air pollution). Air pollution in the Los Angeles region is still an issue, although improvements have been made over the years. But the problem is exacerbated in the Inland Empire, which is surrounded by mountains on the north and the east. Prevailing winds move bad air eastward from Los Angeles, but once the pollution reaches the Inland Empire it cannot be carried further east as it becomes trapped by the mountains surrounding the region .
Inland Empire
21515767#4
According to the American Lung Association's recent "State of the Air 2017" report, California is a leader in air pollution among other states, with the highest ozone levels. The top three cities in the country with the highest recorded levels of ozone (smog) levels were Los Angeles-Long Beach, Bakersfield, and Fresno-Madera. Salinas, California is the only city of California that reports no days of unhealthy air quality. While the air quality in California is significantly better in northern California, more than ninety percent of Californians live in counties with unhealthy air.
Pollution in California
21515767#0
Pollution in California relates to the degree of pollution in the air, water, and land of the state of California. Pollution is defined as the addition of any substance (solid, liquid, or gas) or any form of energy (such as heat, sound, or radioactivity) to the environment at a faster rate than it can be dispersed, diluted, decomposed, recycled, or stored in some harmless form. The combination of three main factors are the cause of notable unhealthy levels of air pollution in California: the activities of over 39 million people, a mountainous terrain that traps pollution, and a warm climate that helps form ozone and other pollutants. Eight of the ten cities in the US with the highest year-round concentration of particulate matter between 2013 and 2015 were in California, and seven out of the ten cities in the US with the worst ozone pollution were also in California. Studies show that pollutants prevalent in California are linked to several health issues, including asthma, lung cancer, birth complications, and premature death. In 2016, Bakersfield, California recorded the highest level of airborne pollutants of any city in the United States.
Pollution in California
17024928#49
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.
Air pollution in the United States
18110#38
The smog season lasts from approximately May to October. While other large cities rely on rain to clear smog, Los Angeles gets only of rain each year: pollution accumulates over many consecutive days. Issues of air quality in Los Angeles and other major cities led to the passage of early national environmental legislation, including the Clean Air Act. When the act was passed, California was unable to create a State Implementation Plan that would enable it to meet the new air quality standards, largely because of the level of pollution in Los Angeles generated by older vehicles. More recently, the state of California has led the nation in working to limit pollution by mandating low-emission vehicles. Smog is expected to continue to drop in the coming years because of aggressive steps to reduce it, which include electric and hybrid cars, improvements in mass transit, and other measures.
Los Angeles
42690935#17
Los Angeles is known for the nation's worst air quality and its “sharp inequalities in environmental exposures”. Wilmington, Los Angeles is a neighborhood located on the southern part of Los Angeles, California. 54,512 people live in Wilmington, the median household income is $40,627, about 86 percentage of them are Latino and only 5.1% of Wilmington residents 25 or older have a four-year degree.
Toxic hotspot
27000#48
Los Angeles was one of the best known cities suffering from transportation smog for much of the 20th century, so much so that it was sometimes said that "Los Angeles" was a synonym for "smog." In 1970, when the Clean Air Act was passed, Los Angeles was the most polluted basin in the country, and California was unable to create a State Implementation Plan that would enable it to meet the new air quality standards. However, ensuing strict regulations by state and federal government agencies overseeing this problem (such as the California Air Resources Board and the United States Environmental Protection Agency), including tight restrictions on allowed emissions levels for all new cars sold in California and mandatory regular emission tests of older vehicles, resulted in significant improvements in air quality. For example, air concentrations of volatile organic compounds declined by a factor of 50 between 1962 and 2012. Concentrations of air pollutants such as nitrous oxides and ozone declined by 70% to 80% over the same period of time.In the late 1990s, massive immigration to Ulaanbaatar from the countryside began. An estimated 150,000 households, mainly living in traditional Mongolian gers on the outskirts of Ulaanbaatar, burn wood and coal (some poor families burn even car tires and trash) to heat themselves during the harsh winter, which lasts from October to April, since these outskirts are not connected to the city's central heating system. A temporary solution to decrease smog was proposed in the form of stoves with improved efficiency, although with no visible results. 
Coal-fired ger stoves release high levels of ash and other particulate matter (PM). When inhaled, these particles can settle in the lungs and respiratory tract and cause health problems. At two to 10 times above Mongolian and international air quality standards, Ulaanbaatar's PM rates are among the worst in the world, according to a December 2009 World Bank report. The Asian Development Bank (ADB) estimates that health costs related to this air pollution account for as much as 4 percent of Mongolia's GDP.
Smog
425258#8
Bel Air is situated about west of Downtown Los Angeles and includes some of the foothills of the Santa Monica Mountains. It lies across Sunset Boulevard from the northern edge of the main campus of the University of California, Los Angeles. At the heart of the community sits the Bel-Air Country Club and the Hotel Bel-Air.
Bel Air, Los Angeles
31133053#0
The South Coast Air Basin—SCAB (or SoCAB) is one of several regional air basin areas designated by the state of California, for the purpose of air quality management and air pollution control in Southern California. The SCAB district was created in 1969. and includes all of Orange County and 
the non-desert regions of Los Angeles County, Riverside County, and San Bernardino County.
The region covers approximately 17100 km and includes much of the Greater Los Angeles Area which is home to approximately 18 million people.
South Coast Air Basin