Voyage of discovery
Carmichaels Area High School student Derek Putila counts macroinvertebrates to determine the water quality index of the stream. He joined other students from throughout Greene County to participate in an assignment to study the freshwater ecosystems and biodiversity of the Monongahela River near Pumpkin Run Park in Rices Landing, led by the educational staff of Pittsburgh Voyager. See details in Sunday’s Herald-Standard or log on to heraldstandard.com.