Tokyo filter placed by Shin Chida filter shows some accumulation of particulates.
The presence of lichens can be an indicator of good air quality. In the UK, some of the cleanest air is found in northern and western Scotland. These photos show an abundance of lichen species on the rocks on the Isle of Skye and Orkney Islands, where the air has been found to be very pure.
www.presshereprojects.com launches soon, visit for a preview and more information about Portraits of Air: Pittsburgh
The filter that was placed by Heidi Neilson at The Center for Book Arts in New York has been moved to Rhoden, Germany. Barbara Beisinghoff placed the filter at the base of an old Oak Tree located in her front yard.
The air filter originally placed on the side of a dumpster on 39th Street in Manhattan is now collecting particulates in Imatra, Finland. Annu Vertanen placed the filter inside her studio for several months and then moved it to the outside of her house on June 6th.
One of the air filters that started out in New York is now placed outside a residential window in Tokyo.