The phrase "a source of ambient" is not complete and lacks clarity in written English.
It can be used when referring to something that provides a background or surrounding atmosphere, but it typically needs additional context to be fully understood.
Example: "The soft music played in the background served as a source of ambient sound, enhancing the overall atmosphere of the café."
Alternatives: "a source of background" or "a source of atmosphere".
Environ Health Perspect 122 639 645; http://dx.doi.org/10.1289/ehp.1307259 Industrial wood manufacturing may be a source of several ambient air pollutants.
However, studies examining a single source of ambient PM10 are infrequent because of the difficulty finding a site without a mixture of various pollutants, and the complexity of apportioning contributions from different sources [ 2, 6].
Because of the large quantities of gas burned, the wide variety of combustion devices, and the wide range of process gas compositions, application of inappropriate data could implicate gas combustion as a significant source of ambient PM2.5.
The ambient PM was generally low in elemental carbon, indicating that combustion sources were not a major source of ambient particulate.
Before the 1990 ban on the sale of coal, coal-related combustion was a major source of ambient air pollution in Dublin (Clancy et al. 2002).
Diesel engine exhaust (DEE) emissions represent a major source of ambient particulate matter (PM) and combustion-derived nanoparticles in most urban settings (Donaldson et al. 2005).
Environ Health Perspect 121 1385 1391; http://dx.doi.org/10.1289/ehp.1306761 Motor vehicle emissions are a major source of ambient air pollution in the United States and elsewhere.
18 In metropolitan areas, road traffic is a major source of ambient air pollution, and produces strong spatial gradients in pollution concentrations.
During recent years, the number of motor vehicles in Beijing has increased rapidly and traffic emissions have become a dominant source of ambient air pollution (Stone 2008; Wang et al. 2009; Zhou et al. 2010).
Vehicle emissions, particularly those related to diesel engines, are a major source of ambient UFPs, which penetrate to the indoor environment (Franck et al. 2003; Levy et al. 2002).
