Different people will answer differently in regards to what they believe is the role of their government. Some might agree that government should work to protect the best interest of its people and land. Again, different people might answer differently about what is in a people's and land's best interests.
When enough people agree, however, that a business' actions are not in the best interest of the environment, the group will look for justice. Justice in environmental law cases can be secured in various ways. The Environmental Protection Agency creates laws. Sometimes, the EPA and other government actions might not be satisfactory enough to environmental enthusiasts.