The Earth hit a worrying climate change milestone this month, and it appears to be permanent. The concentration of carbon dioxide in the planet’s atmosphere has surpassed 400 parts per million during ...

Trichlorofluoromethane is a colorless, nonflammable liquid or gas at room temperature and has a faint ether-like odor detectable at a threshold concentration of about 5 ppm (ACGIH 1991).

4-Methyl-2-pentanone or methyl isobutyl Ketone (MIBK) is a clear liquid with a sweet odor (ACGIH 1991). According to a review by Amoore and Hautala (1983), the odor threshold of MIBK in air is 0.68 ...