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Glossary


Greenhouse Gas Emissions

Emissions of gases related to human activities that
accelerate the “greenhouse effect.” The term "greenhouse effect" describes the natural
heat-trapping qualities of trace gases in the Earth's atmosphere. Human activities have
significantly increased the concentrations of natural greenhouse gases such as carbon
dioxide. While carbon dioxide is not the only greenhouse gas, it is the main contributor to
warming. Other important greenhouse gases include nitrous oxide and methane, both of
which have increased in the last century.