the observed increase in the average temperature of the Earth’s innermost atmosphere, which is believed to be a result of the greenhouse effect. See CLIMATE CHANGE.
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.
