Environmental Defense Fund (EDF) is one of the largest and most influential environmental nonprofits in the United States, known for combining science, economics, and policy to address climate, energy, ocean, and public health challenges. The organization has played a significant role in advancing emissions reduction strategies, sustainable fisheries management, methane monitoring, and corporate sustainability initiatives. Rather than focusing solely on advocacy, EDF frequently works with businesses, governments, researchers, and community groups to develop practical solutions with measurable environmental impact. Its research, policy expertise, and global partnerships have helped shape environmental decision-making for decades.