Polycyclic aromatic hydrocarbons (PAH) are formed during the incomplete combustion of organic materials (e.g., coal, oil, biomass, and gasoline and diesel fuels) and are ubiquitous in the atmosphere.

Informed assent and consent was obtained from each child and a parent respectively. The protocol was reviewed and approved by the University of Southern California Institutional Review Board.

Going back to the '90s. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The 1990s were a boom time for ambient music, and SampleRadar has got the ...

As you'll know if you've been following it for a while, SampleRadar loves to shake a leg on the dancefloor. But there are also times, just like for everyone else, when it likes to relax and have a ...