Limits to Growth, The

Litigation

Malthus, Thomas Robert English Classical Economist and Clergyman (1766–1834)

Marine Protection, Research, and Sanctuaries Act

Mass Media

Mediation

Medical Waste

Mercury

Methane (CH4)

Mexican Secretariat for Natural Resources

Mining

Mining Law of 1872

Mixing Zone

Mold Pollution

Montréal Protocol

Nader, Ralph American Consumer Advocate and Environmentalist (1934–)

NAFTA (North American Free Trade Agreement)

National Environmental Policy Act (NEPA)

National Oceanic and Atmospheric Administration (NOAA)

National Park Service

National Pollutant Discharge Elimination System (NPDES)

National Toxics Campaign