Researchers have found tiny particles of plastic in clouds, where they may be contributing to climate change. Scientists collected water from the clouds surrounding Japan's Mount Fuji and Mount Oyama at altitudes between 1,300-3,776m and then applied advanced imaging techniques to determine whether microplastics were present, reported Sky News. Nine different types of polymers and one type of rubber were found in the airborne microplastics, at concentrations between 6.7-13.9 pieces per liter and sizes ranging between 7.1-94.6 micrometers.