It is well known that washing clothes can release a large number of microfibers into wastewater, but it is unclear whether drying of clothes would have any impact on the environment. A pilot study by scientists from City University of Hong Kong (CityU) reports that a single clothes dryer can discharge up to 120 million microfibers annually—1.4 to 40 times of that from washing machines. To control the release of these harmful airborne microfibers, the team suggested that additional filtration systems should be installed for dryer vents as soon as possible.