Below are a few examples of state/local agencies and groups that concentrate on environmental issues within the government.
Environmental Protection Agency in Massachusetts
Joint Committee on Environment, Natural Resources, and Agriculture
Massachusetts Department of Environmental Protection (MASSDEP)
Massachusetts Environmental Policy Act Office (MEPA)
United Nations (UN)
Pacific Regional Environmental Programme (SPREP)
Some of the relevant federal agencies and departments are listed here. This list is by no means exhaustive.
U.S. Environmental Protection Agency (EPA)
U. S. Department of the Interior
U. S. Department of Agriculture (USDA)