Green Glossary – Z

Zero Emission Vehicles or ZEVs
Cars or vehicles that do not run on fossil fuel derived gasoline and consequently do not produce carbon emissions or air pollutants.
Zero Energy Building or ZEB
The term for buildings that do not consume energy from conventional power plants and that produce zero carbon emissions. A zero energy building does not rely on supply from the energy grid because it uses its own means to harvest energy on site, usually through solar, wind or hydro power.
Zero Waste
Zero waste is a philosophy and a design principle for the 21st Century.
Zone of Saturation
The layer beneath the soil surface that contains openings that may fill with water.
Zoning
The arrangement or partitioning of land areas for various types of usage in cities, boroughs or townships.
Zoonosis
Refers to any infectious disease that can spread from animals to humans or conversely from humans to animals.