What exactly are green jobs?

A green job, also called a green-collar job is, according to the United Nations Environment Program, "work in agricultural, manufacturing, research and development (R&D), administrative, and service activities that contribute(s) substantially to preserving or restoring environmental quality. Specifically, but not exclusively, this includes jobs that help to protect ecosystems and biodiversity; reduce energy, materials, and water consumption through highefficiency strategies; de-carbonize the economy; and minimize or altogether avoid generation of all forms of waste and pollution."