The "Green Investment Scheme" (GIS) is a plan for achieving environmental benefits from trading surplus allowances (AAUs) under the Kyoto Protocol. The Green Investment Scheme (GIS), a mechanism in the framework of International Emissions Trading (IET), is designed to achieve greater flexibility in reaching the targets of the Kyoto Protocol while preserving environmental integrity of IET. However, using the GIS is not required under the Kyoto Protocol, and there is no official definition of the term.
