Toxic air pollutants are poisonous substances in the air that come from natural sources (for example, radon gas coming up from the ground) or from manmade sources (for example, chemical compounds given off by factory smokestacks) and can harm the environment or your health.
Subsequently, Scorpius X-1 was discovered in 1962 by a team, under Riccardo Giacconi, who launched an Aerobee 150 sounding rocket carrying a highly sensitive soft X-ray detector designed by Frank Paolini.
History of the Procedure. In 1854, Ward first described schneiderian papillomas (SPs) of the nose (ie, sinonasal papilloma).These benign lesions were named in honor of C. Victor Schneider who, in the 1600s, demonstrated that nasal mucosa produces catarrh and not CSF and identified its origin from the ectoderm.