I am beginning research to create a white paper on the emerging "clean tech economy." I will need to define what are "clean occupations" and "clean industries." There does not seem to be a lot of official consensus out there on the topic on definitions.
The Pew Trust has released a report with their own definitions, as other agencies have done the same. State labor departments have released their own reports also, attempting to define these industries and occupations. The Bureau of Labor has mentioned "green jobs" occassionally, but has not created an official definition.
There is low inter-consistency between these reports on "clean" occupations and industry definitions. I am missing any source or leading report on the topic?