Whether it be trying to stop a uranium mine or trying to save a tree in their backyard, these people are almost always unfunded and overworked.
Law students have a vital role in helping such groups.
The assisstance of law students has, in the past, eased the burden on volunteers who otherwise have to pay lawyers to do all the work, including research and submissions that could be done by students. Groups often do not want to litigate, but rather need information to ensure that they are complying with the law, or may need to know the consequences of breaking the law. Law students are often one of the only avenues for providing such information.