When zebra mussels emerged as a dire ecological and economic threat across the Great Lakes in the 1990s, it was a wakeup call that the existing patchwork of international, state and federal regulations were not protecting the delicate ecosystem, the source of drinking water for millions of people.
In response, some industry leaders came together to form a voluntary sustainability certification organization called Green Marine.
Great Lakes Now
https://www.greatlakesnow.org/2021/11/green-marine-voluntary-improve-port-sustainability/