1. a superlative term describing a person who is accomplished or exceptionally noteworthy in a specific field or area of work, sometimes though not always within the environmental or green sector.
2. to call someone
the Al Gore of an area or field describes a person who had once experienced a tragic loss or hardship, but then later went on to accomplish great things.
Gore's presidential bid in 2000 was considered tragic because he had won the popular vote but lost the electoral college to George W. Bush due to highly suspicious
voting irregularities in a state governed by the winner's brother.