Some people often mistakecontrails for chemical trails, or chemtrails. People have even claimed that the trails left behind by planes contain chemicals purposelyreleased into the atmosphere. Some believe that governments are sprayingchemicals for various purposes, such as to change the weather or to control the population with drugs. However, these conspiracy theories lack proof. After looking into these claims, scientists havestepped forwardto dismissthem.
Contrary to what some people believe, scientists have explained that contrails are not directly harmful to humans. Contrails that last for a long time, though, might become an increasinglyserious problem for the environment. In particularly ideal conditions, some contrails can spread and form cirrus clouds that last for hours. These artificialcirrus clouds can cool the planet by blocking radiation from the Sun and reflectingit back into space. However, they also trap heat from the Earth’s surface and stop it from escaping into space. This effect is a major concern for scientists as contrails can play a part in global warming.
