Green-collar

1976, Patrick Heffernan, “Jobs for the Environment — The Coming Green Collar Revolution”, in Jobs and Prices in the West Coast Region: Hearing before the Joint Economic Committee, Congress of the United States, Ninety-Fourth Congress, Second Session, U.S. Government Printing Office, page 134,

Source: wiktionary

1997, Geoff Mulgan, Perri 6 [sic], et al., The British Spring: A Manifesto for the Election After Next, Demos, page 26, The United States, Canada, Germany, and Denmark are all generating hundreds of thousands of new 'green collar' jobs, especially for young people, achieving remarkable reductions in energy, water, waste disposal and materials costs.

Source: wiktionary

2001, Diane Warburton and Ian Christie, From Here to Sustainability: Politics in the Real World, Earthscan, page 75, Studies for the UK suggest that the more than 100,000 existing 'green collar' workers in environmental occupations could be joined by many thousands more, both in the private sector and in the 'social economy' of community enterprises.

Source: wiktionary

1983, U.S. Senate Subcommittee on Forestry, Water Resources, and Environment, Cultivation of Marihuana in National Forests: Hearing Before the Subcommittee on Forestry, Water Resources, and Environment, […], U.S. Government Printing Office, page 32, American [marihuana] growers, who have more recently become known as America's "green-collar" workers because of the bright green color of their product, […]

Source: wiktionary