IrradianceThe direct, diffuse, and reflected solar radiation that strikes a surface.
IrrigationThe controlled application of water for agricultural purposes through manmade systems to supply water requirements that are not satisfied by rainfall.
Irrigation Non-Expansion Area (INA)A geographic area in Arizona that has been designated as having insufficient groundwater to provide a reasonably safe supply for the irrigation of the…
Isolated Solar Gain SystemA type of passive solar heating system where heat is collected in one area for use in another.
IssuesUnresolved conflicts regarding alternative uses of available resources. Subjects of public interest.