NASA researchers are helping to fill a big gap in scientists' understanding of how much urban pollution -- and more precisely formaldehyde -- ultimately winds up in Earth's upper atmosphere where it ...

This study is based on two sampling campaigns performed in October–November, 1999 (campaign A) and 2000 (campaign B). In total, 64 subjects living in two Swedish cities, Borås (100,000 inhabitants, ...

He also attributes its success to a new air-sampling system, which features a glass- and Teflon-coated tube that draws in and directs air into the instrument's detection cell. Though the ...