Ozone in the lower atmosphere is a known cause of respiratory problems and currently causes up to 4,700 deaths per year. [http://www.globalwarminghoax.com/news.php?extend.7] | Ozone in the lower atmosphere is a known cause of respiratory problems and currently causes up to 4,700 deaths per year. [http://www.globalwarminghoax.com/news.php?extend.7] |