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.
1 It was a meat eater about the size of a German shepherd. 2  The first Eoraptor skeleton was discovered in Argentina in 1991. 3  However, another dinosaur has recently been found in Madagascar that dates as being 230 million years old.