Full Professor, Federal University of Viçosa

Costa has dedicated his career to geosciences, with a special emphasis on climatology. From the study of large-scale hydrology to micrometeorology, Costa is fascinated by the interactions between Earth’s air, land, and water. He earned his B.A. and M.S. from Brazil’s University Federal of Viçosa, and his doctorate in atmospheric and ocean sciences from the University of Wisconsin-Madison. Today, Costa is a full professor at his alma mater, the Federal University of Viçosa. Visit him online.

Hear more about the sources of greenhouse gas emissions in Unit 3, which brings the path to a safer, low-carbon economy into sharper relief. 

Former Fellow for Transportation and Buildings, Project Drawdown

Allard advances solutions to the climate challenge by sharing his broad knowledge of transportation systems and their impact on our climate. His specialties include: sustainable transport, passenger intermodality, intercity transport, competitive issues in transportation, and cooperation among transportation systems. Beyond these topics, Allard has published peer-reviewed research and presented at international conferences on transport solutions to reduce climate change, and on mass transit, high-speed rail, car-driver support technologies, and systems design that encourages socially optimum behavior. Prior to joining Project Drawdown, Allard earned degrees from the Massachusetts Institute of Technology as well as the University of Lisbon in Portugal. Follow him on Twitter and LinkedIn.

Hear more about transportation and emissions sources in Unit 3, which covers the biggest slices of the global emissions pie.

Gaylord Nelson Distinguished Professor, University of Wisconsin-Madison

Holloway is the Gaylord Nelson Distinguished Professor at the University of Wisconsin-Madison, jointly appointed in the Nelson Institute for Environmental Studies and the Department of Atmospheric and Ocean Sciences. She is a leading air quality scientist, working at the intersection of air quality, energy, climate, and public health. As Team Lead for the NASA Health and Air Quality Applied Sciences Team, Holloway connects NASA data with stakeholder interests in air quality management and public health. She is an award-winning leader and mentor who co-founded (and led) the Earth Science Women’s Network—a group supporting the scientists of today and welcoming a diverse community of scientists for tomorrow. Follow Holloway on Twitter and visit her online.

Hear more about cost-effective climate solutions in Unit 6, which covers changing infrastructure and innovating new technologies for a brighter future.

Assistant Professor, University of California, Santa Barbara

Dr. Stokes works on energy, climate, and environmental politics. Within American Politics, her work focuses on representation and public opinion; voting behavior; and public policy—particularly at the state level. Within environmental politics, she researches climate change, renewable energy, water and chemicals policy. Stokes’ book, Short Circuiting Policy, examines the role that utilities have played in promoting climate denial and rolling back clean energy laws. She contributed to the anthology, All We Can Save—a collection of essays written by influential women in the climate space, and co-hosts the podcast “A Matter of Degrees” with Project Drawdown alum Dr. Katharine Wilkinson. Follow Stokes on Twitter and visit her online.

Hear more about game-changing climate solutions in Unit 5, which outlines clear paths to safe, equitable, and comprehensive climate action.

Founder and Managing Partner, FullCycle

AlHusseini is a renowned venture capitalist, sustainability-focused entrepreneur, and philanthropist with more than 25 years of experience in operations, sales, and finance. Raised in Saudi Arabia, he dedicates much of his career to helping angel investors find clean technology and natural resource investments that advance social change around the globe—all while  producing significant returns. As founder of FullCycle, AlHusseini focuses on reversing the effects of climate change by accelerating the deployment of climate-restoring technologies. Follow him on Twitter and visit him online.

Hear more about bold climate investing in Unit 6, which covers efforts to activate investors with an eye on global change.