Greenpeace Bulgaria and members of local Friends of the Earth give a lecture and hold an open discussion on the topic of clean air. Тhe main focuses of the lecture were: sources of pollution and health effects, technical solutions and funding opportunities for projects for "smart devices"; and presentation of "Dustcounters 2.0" (do-it-yourself devices that allow users to measure the levels of dust and particulate matter near their homes or workplaces).