Albert Arnold "Al" Gore, Jr. (born March 31, 1948) is the former forty-fifth Vice President of the United States, who served from 1993 to 2001 under President Bill Clinton. A prominent environmental activist, Gore was awarded the 2007 Nobel Peace Prize (together with the Intergovernmental Panel on Climate Change) for the "efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change."

Aldo Leopold (January 11, 1887 - April 21, 1948) was a United States ecologist, forester, and environmentalist. He was influential in the development of modern environmental ethics and in the movement for wilderness preservation. Aldo Leopold is considered to be the father of wildlife management in the United States and was a life-long fisherman and hunter.

Dr James Ephraim Lovelock, CH, CBE, FRS (born 26 July 1919) is an independent scientist, author, researcher, environmentalist, and futurist who lives in Cornwall, in the south west of Great Britain. He is known for proposing the Gaia hypothesis, in which he postulates that the Earth functions as a kind of superorganism.

Dr. Kevin E. Trenberth is Head of the Climate Analysis Section at the National Center for Atmospheric Research. From New Zealand, he obtained his Sc. D. in meteorology in 1972 from Massachusetts Institute of Technology. He was a lead author of the 1995, 2001 and 2007 Intergovernmental Panel on Climate Change (IPCC) Scientific Assessment of Climate Change. He recently served on the Scientific Steering Group for the Climate Variability and Predictability (CLIVAR) program and was co-Chair from 1995 to1999.

Dr. Laurence S. Kalkstein is a Senior Research Fellow in the University of Delaware’s Center for Climatic Research.  He received his undergraduate degree from Rutgers University and his Masters and Ph.D. from Louisiana State University. He is the principal investigator on a number of contracts dealing with the assessment, development and implementation of heat/health watch-warning systems for major cities worldwide. 

Daniel Schrag studies climate and climate change over the broadest range of Earth history. He has examined changes in ocean circulation over the last several decades, with particular attention to El Niño and the tropical Pacific. He has worked on theories for Pleistocene ice-age cycles including a better determination of ocean temperatures during the Last Glacial Maximum, 20,000 years ago.

Dean Speth served as administrator of the United Nations Development Programme and chair of the UN Development Group. Throughout his career, Dean Speth has provided leadership and entrepreneurial initiatives to many task forces and committees whose roles have been to combat environmental degradation, including the President’s Task Force on Global Resources and Environment; the Western Hemisphere Dialogue on Environment and Development; and the National Commission on the Environment.

Donald Kennedy is an American scientist, public administrator and academic. Trained as a biologist, Kennedy has become an expert in environmental problems related to major land-use changes, economically driven alterations in agricultural practice, global climate change and the development of regulatory practices.

John Muir (April 21, 1838 – December 24, 1914) was one of the first modern preservationists. His letters, essays, and books telling of his adventures in nature, and wildlife, especially in the Sierra Nevada Mountains of California, were read by millions and are still popular today. His direct activism helped to save the Yosemite Valley and other wilderness areas. The Sierra Club, which he founded, is now one of the most important conservation organizations in the United States. His writings and philosophy strongly influenced the formation of the modern environmental movement.

Jonathan Patz ,MD, MPH, is Professor of Environmental Studies & Population Health Sciences at the University of Wisconsin-Madison, where he directs a university-wide initiative on Global Environmental Health. From 1996-2000, he was principal investigator for the largest US multi-institutional study on climate change health risks and has briefed the US Congress, Administration, and federal agency leaders, and has served on committees of the National Academy of Sciences. His areas of research investigation include the effects of climate change on heat waves, air pollution and water and vector-borne infectious diseases, as well as the link between deforestation and the resurgence of malaria in the Amazon.

Jon Foley is the founder and Director of the Center for Sustainability and the Global Environment (SAGE) at the University of Wisconsin, where he is also the Gaylord Nelson Distinguished Professor of Environmental Studies and Atmospheric & Oceanic Sciences. Foley’s work examines complex global environmental systems and their interactions with human societies. His research team uses state-of-the-art computer models and satellite measurements to analyze changes in ecosystems, land use, climate and freshwater resources across local, regional and global scales. Their work has contributed to the understanding of large-scale ecosystem processes, global patterns of land use, the planet's water and carbon cycles, and interactions between ecosystems and the atmosphere.

Michael Oppenheimer is the Albert G. Milbank Professor of Geosciences and International Affairs in the Woodrow Wilson School and the Department of Geosciences at Princeton University. He is also Director of the Program in Science, Technology and Environmental Policy (STEP) at the Woodrow Wilson School and Faculty Associate of the Atmospheric and Ocean Sciences Program, Princeton Environmental Institute, and the Princeton Institute for International and Regional Studies. He joined the Princeton faculty after more than two decades with Environmental Defense, a non-governmental, environmental organization, where he served as chief scientist and manager of the Climate and Air Program.

Mario J. Molina is a Mexican chemist known mostly for being one of the largest precursors to the discovering of the Antarctic ozone hole. Molina was awarded the 1995 Nobel Prize in Chemistry for his role in elucidating the threat to the Earth's ozone layer of chlorofluorocarbon gases (or CFCs). Mario Molina became the first and only Mexican to ever receive a Nobel Prize for science. He was an Institute Professor in the Department of Earth, Atmospheric, and Planetary Sciences at the Massachusetts Institute of Technology.

Prince Charles of Wales The Prince has taken a keen interest in environmental issues, and has taken a leadership role in promoting environmentally sensitive thinking, within business practice as well as urban planning and design. The latter ties in with his Prince's Foundation for the Built Environment.
In December 2006, Charles announced plans to make his household's travel plans more eco-friendly. Later, in 2007, he also published in his annual accounts the details of his own carbon footprint, as well as targets for reducing his household's carbon emissions. That same year, Charles received the 10th annual Global Environmental Citizen Award from Harvard Medical School's Centre for Health and the Global Environment

Rachel Louise Carson (May 27, 1907 – April 14, 1964) was an American marine biologist and nature writer whose writings are often credited with launching the global environmental movement. In the late 1950s, Carson turned her attention to conservation and the environmental problems caused by synthetic pesticides. The result was Silent Spring (1962), which brought environmental concerns to an unprecedented portion of the American public. Silent Spring spurred a reversal in national pesticide policy—leading to a nationwide ban on DDT and other pesticides—and the grassroots environmental movement it inspired led to the creation of the Environmental Protection Agency.

Richard Somerville is a theoretical meteorologist whose research interests include geophysical fluid dynamics, thermal convection, computational methods, predictability, atmospheric modeling, numerical weather prediction, radiative transfer, cloud physics, and climate.

Stephen H. Schneider is Professor of Environmental Biology and Global Change (Professor by Courtesy in the Department of Civil and Environmental Engineering) at Stanford University, a Co-Director at the Center for Environment Science and Policy of the Freeman Spogli Institute for International Studies and a Senior Fellow in the Stanford Woods Institute for the Environment. He has served as a consultant to Federal Agencies and/or White House staff in the Nixon, Carter, Reagan, George H. W. Bush, Clinton and George W. Bush administrations. His research includes modeling of the atmosphere, climate change, and "the relationship of biological systems to global climate change." He has helped draw public attention to the issue of climate change.

Sir Richard Charles Nicholas Branson (born 18 July 1950) is an English entrepreneur, best known for his Virgin brand of over 360 companies. On 21 September 2006, Branson pledged to invest the profits of Virgin Atlantic and Virgin Trains in research for environmentally friendly fuels. The investment is estimated to be worth $3 billion.

Stavros Dimas is a Greek politician, currently serving as European Commissioner for the Environment. Dimas oversaw the introduction of the EU's emissions trading scheme, that took effect on 1 January 2005, despite emissions reduction plans from Poland, Italy, the Czech Republic and Greece not having been approved on time. He also sought to include companies operating aircraft under the emissions trading regime.

Tom Wigley a senior scientist in the Climate and Global Dynamics Division, has been named a fellow of the American Association for the Advancement of Science (AAAS) for his major contributions to climate and carbon-cycle modeling and to climate data analysis. A mathematical physicist with a doctorate from the University of Adelaide in Australia, Tom is one of the world’s foremost experts on climate change and one of the most highly cited scientists in the discipline. He has published on a diverse collection of topics in climatology including data analysis; climate impacts on agriculture and water resources; paleoclimatology; and modeling of climate, sea level, and the carbon cycle.

William McDonough is the founding principal of William McDonough + Partners, Architecture and Community Design, an internationally recognized design firm practicing ecologically, socially, and economically intelligent architecture and planning in the U.S. and abroad.

Ya’qūb ibn Ishāq al-Kindī (c. 801–873 CE), also known by the Latinized version of his name Alkindus to the West, was a Muslim Arab[1] polymath: a philosopher, scientist, physicist, astrologer, astronomer, cosmologist, chemist, logician, mathematician, musician, physician, psychologist, and meteorologist.

The earliest known work concerned with environmentalism and pollution was an Arabic medical treatise written by al-Kindi. His writings, along with the works of his successors, covered a number of subjects related to pollution such as air contamination, water contamination, soil contamination, solid waste mishandling, and environmental assessments of certain localities.