A Thousand Horses

Nashville Band Known for Singles Like "Smoke"

Aad Boot

Managing Partner at HRS Business Transformation Services

Achenyo Idachaba

Head of MitiMeth, A Nigeria-Based Environmentally Aware Production Company

Adam G. Riess

Nobel Prize-Winning Astrophysicist

Adam Lowry

Co-Founder & Chief Greenskeeper of Method Products

Adam Ostrow

Chief Digital Officer, TEGNA

Adam Sanders

Country Music Singer-Songwriter

Adam Werbach

Global CEO Saatchi & Saatchi S

Adnan Nawaz

News Anchor for BBC World

Alan Gustafson

NASCAR Crew Chief

Alan Weisman

Journalist / Author

Alex Epstein

Founder, Center for Industrial Progress Author, Fossil Fuels Improve the Planet

Alex Goldfayn

Marketing Evangelist; Author of Evangelist Marketing: What Apple, Amazon and Netflix Understand About Their Customers (That Your Company Probably Doesn’t)

Alex Laskey

Founder and Former President at OPOWER

Alexa Clay

Writer, Culture Hacker, Innovation Strategist & Co-Author of "The Misfit Economy"

Alexis Madrigal

Senior Editor at The Atlantic & Author of "Powering the Dream: The History and Promise of Green Technology"

Alf Rehn

Author, Speaker & Professor of Innovation, Design, and Management at the University of Southern Denmark

Alfred Poor

Health Tech Futurist & Writer

Alfred Poor, The Health Tech Futurist

Alison Gopnik

Professor & World Leader in Children's Learning and Development

Alpana Singh

Restaurateur, Master Sommelier, TV Host & Author