a measure of the acidity or alkalinity of a material, liquid, or solid. A substance’s pH is represented on a scale of 0 to 14: 7 represents a neutral state; 0, the most acidic; and 14, the most alkaline.
pltintern
Christine Song supports both Project Learning Tree (PLT) US and Canada's program delivery and reporting, program research, and communications. Christine holds a Master of Environmental Science from the University of Toronto and and a combined degree with a Bachelor of Science in ecology and zoology and a Bachelor of Science in anthropology from the University of Calgary.
