I hesitated to add this category, but some things are generally about RI's environment. Listing them under 10 or 20 categories would be too much. So some organizations that are into a dozen or more environmental categories are categorized here.
Comprehensive organizations include all the state's libraries -- public, academic, school, hospital, and special collections. Brick-and-mortar libraries hold vast environmental information resources. Not everything is on the web! There are several consolidated online catalogs. Everybody should be familiar with searching the Ocean State online catalog with the holdings of all the public libraries. You can also find the same catalog through every local library website as well as on computers in each library.