MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY MICHAEL SZOENYI / SCIENCE PHOTO LIBRARY
Air pollution monitoring. This Kappabridge KLY-3S device is used to measure the amounts of tiny pollutant particles on the leaves of holm oak trees (Quercus ilex). This is being done to study the levels of airborne particulate matter in the city of Rome, Italy. Holm oaks are grown extensively throughout the city, making them ideal for the purpose.
Model release not required. Property release not required.