Michael R. Bloomberg is the founder of the global financial data services and media company, Bloomberg LP.
Between 2002 and 2013, he served as Mayor of New York City and reduced the city’s carbon footprint by 19 percent, revitalized the waterfront, implemented ambitious public health and anti-poverty programs, expanded support for arts and culture, and increased graduation rates and private sector job numbers to record highs.
As a philanthropist, Bloomberg has given over $3.3 billion in support of education, public health, government innovation, the arts, and the environment. In 2014, United Nations Secretary-General Ban Ki-Moon appointed Bloomberg Special Envoy for Cities and Climate Change. In that role, Bloomberg works to highlight the climate work cities are doing and the critical role mayors can play in helping nations create ambitious carbon reduction commitments.
This builds on his role as president of the board of the C40 Climate Leadership Group, a network of megacities working to reduce global greenhouse gas emissions. Bloomberg also serves as a Co-Chair of Risky Business, an organization that is quantifying the economic risks American businesses face from climate change.
Antha Williams leads the Environment Program at Bloomberg Philanthropies. Previously she was Senior Vice President at Corridor Partners, a donor advisory firm focused on climate and clean energy. Antha also worked as the Advocacy Executive at Atlantic Philanthropies, where she oversaw grants to support health care and comprehensive immigration reform. As Program Officer at Beldon Fund, Antha built support for environmental issues by policymakers through grassroots organizing at the state level.
Outside of philanthropy, Antha has worked as a campaigner and organizer, directing large scale voter protection efforts, and serving in leadership positions for five years with Green Corps, a training program for aspiring environmental organizers. Antha graduated from Dartmouth College and lives in New York.
Hongpeng Lei serves as Global Director, Climate at the Children’s Investment Fund Foundation (CIFF).
Hongpeng joined CIFF in 2015. Currently, he leads CIFF’s global portfolio on cities, transport, air quality, and cooling. He also oversees CIFF’s regional strategy and implementation in East and South East Asia, including China as CIFF’s China Chief Representative, working on energy transition, climate finance, cities and transport, air quality, food and land use, and China’s roles in global climate actions.
Hongpeng’s career spans government, think tanks, NGOs and philanthropies. Before joining CIFF, he was the Director of the Energy Program in China for the World Resources Institute, focusing on renewable energy, energy efficiency, and low-carbon city planning and demonstration.
Previously, Hongpeng led WWF China’s climate and energy team and Low Carbon City Initiative. He authored “Low Carbon Cities: Why and How” in 2010, providing a systematic methodology and criteria for developing low-carbon cities in China. He also worked on building energy efficiency and green buildings at China’s Ministry of Construction (currently known as the Ministry of Housing and Urban-Rural Development), where he gained extensive experience in the building sector.
Hongpeng sits on the Board of Energy Foundation China, a strategic re-granter pursuing clean energy, safe climate and sustainable prosperity. He chairs the Steering Committee of the Southeast Asia Energy Transition Partnership, a multi-donor partnership formed by governmental and philanthropic partners to accelerate sustainable energy transition in the region.
His current advisory roles include Special Advisor of the China Council for International Cooperation on Environment and Development (CCICED), which supports China’s top decision-makers with sustainable development recommendations; member of the China Strategy and Development Committee of the World Resources Institute, a world-leading thinktank on environment and climate; and member of the China Advisory Committee of the African Climate Foundation, which unlocks development opportunities for climate action in Africa.
Hongpeng has both an engineering and a management degree.
Jesper Nygård is the former CEO of Realdania, a private member-based philanthropic association in Denmark with around 19,000 members. Since 2023, Realdania has supported philanthropic projects focused on sustainability in the built environment.
In March 2025, Mr. Nygård stepped down from his CEO position at Realdania to focus on several board positions including Chairman of the Danish Film Institute, Chair Leader of The Danish Management Society and Philea.
Mr. Nygård is a skilled moderator and active public debater both nationally and internationally. He advocates for smart climate solutions to be retrofitted in existing urban areas and for the development of new urban areas. Mr. Nygård firmly believes that by working collectively and in partnerships, individuals and organizations can achieve far greater things than they can alone.
Bruce Lindsey serves as the Chairman of the Board of the Clinton Foundation. Bruce joined the Foundation in 2001 as general counsel and became CEO in 2003. Bruce served as assistant to the president and deputy counsel to the president throughout President Clinton’s two terms in office.
He had previously been a partner at Wright, Lindsey & Jennings, a law firm in Little Rock, where he is currently ‘of counsel.’ Bruce received a J.D. from Georgetown University Law Center and a B.A. from Rhodes College.
Jennifer Musisi is a transformational leader with three decades of experience in turning around institutions and systems in challenging settings. She was the first Executive Director of Kampala, the Capital City of Uganda (a role comparable to mayor, chief executive or city manager). She has earned a global reputation for integrity, leadership, innovation, and building strong systems to overcome corruption, inadequate financing and dysfunction. She automated revenue management and service delivery systems and mobilized local and international finances to implement a wide range of sustainable development projects. Ms Musisi was appointed a UN Ambassador for Sustainable Development under Goal 11, and is also the City Leader in Residence at the Bloomberg Harvard City Leadership Initiative.
Mete Coban MBE is the Deputy Mayor of London for Environment and Energy, overseeing the Mayor’s world-leading climate action plan for the capital. Before becoming Deputy Mayor in July 2024, Mete was a Councillor and Cabinet Member for Climate Change, Environment, and Transport in the London Borough of Hackney, delivering a £61 million Green New Deal to tackle the climate crisis. He is best known for pioneering Hackney’s Community Energy Fund, providing clean, green, community-owned energy to 39 not-for-profits. Mete is widely credited with making politics more accessible to young people as the Founder of the youth-led charity My Life My Say. He led the Give an X voter registration campaign, which resulted in over 488,000 newly registered voters ahead of the UK General Election in July 2024. In the New Year’s 2020 Honours List, Mete received an MBE for services to young people, recognising his efforts to make politics and democracy more accessible to the younger generation. Mete also serves as a Trustee at the London Marathon Foundation and My Life My Say.
Shirley Rodrigues is a member of the Board of C40 Cities, a global network of nearly 100 mayors united in climate action, and is Chair of the Breathe Cities Advisory Committee and an Our Common Air Commissioner, where she is working to reduce air pollution harmful to public health and climate.
Previously she was the London Deputy Mayor for Environment and Energy between 2016 and 2024 where she headed world-leading initiatives to tackle the climate emergency, reduce air pollution and restore nature in London. This included delivering the Ultra Low Emission Zone, the world’s largest clean air zone of its kind, as well as inclusive programmes and policies to make London a net zero carbon city by 2030 and more resilient to climate impacts.
Before then she oversaw a global climate change grants portfolio at the Children’s Investment Fund Foundation (CIFF), developing their first cities strategy and making grants to support climate action in China and Brazil and by international co-operation networks. She has held various executive positions in government including for three London mayors, is a trustee of the Artichoke Trust and is an expert advisor to the Earthshot Prize.
Vittoria Beria is Head of International Affairs for the City of Milan. In this role, she advises the Mayor on international affairs, manages the City of Milan international partnerships and projects and city diplomacy activities. Vittoria supports the Mayor in his role as C40 Vice Chair and coordinates the activities undertaken to fulfil C40 commitments, as well as the participation in C40 programmes and initiatives. Previously, Vittoria coordinated international partnerships at the World Expo 2015 and served as a United Nations officer for over a decade. Vittoria holds a Degree in Economics and Business Administration from the Catholic University of Milan and an MSc in Development Management from the London School of Economics and Political Science