Using probes and handheld computers, they measured pH levels in local water sources, and, back in the classroom, the students analyzed the data they had collected. (edutopia.org)
The high school students collected insect larvae, daphnia, and snail eggs from local water sources and examined them under the microscope, making a total of 230 images. (edutopia.org)
[10], [11] Recognizing the potential health and environmental impacts on local water sources, the EPA is studying water impacts of hydrofracking on gas shale production. (ucsusa.org)