Zero carbon means that no carbon emissions are being produced from a product. An example would be a wind farm generating electricity.

Zero waste is the conservation of all resources by means of responsible production, consumption, reuse, and recovery of products, packaging, and materials without burning and with no discharges to land, water, or air that threaten the environment or human health.

Zinc is a trace mineral, meaning the body only needs small amounts. It is needed for immune function, wound healing, blood clotting, thyroid function, and more. It also plays a key role in maintaining vision and might have effects against viruses. It is a major player in the creation of DNA, growth of cells, building proteins, building proteins, and supporting healthy immune system.

Zoonosis is an infectious disease that has jumped from a non-human animal to humans.