Just found this US site:
Green Museums Initiative. From the site:
The Green Museums Initiative Committee has created this new website to inspire and offer practical ideas to help your institution become a "green museum". Whether you are just starting out or are already accomplished in your green practices, join us in the realization of a green and sustainable museum field.
It looks very interesting with content relating to: collections, exhibitions, buildings and operations, education etc.
It also includes
The Green Museum Accord. From the site:
The Green Museums Accord is a non-legally binding commitment to
sustainable practices: an institution-wide pledge to begin greening your
museum.Would be great to have an Australian focused version.
Green Museums Initiative sponsored by CAM: "Sponsored by the California Association of Museums"