Mark Jacobson is Professor of Civil and Environmental Engineering at Stanford University and Director of its Atmosphere/Energy Program. He is also a Co-Founder of the non-profit, Solutions Project. Mark has published textbooks and journal articles, been featured on TED Talks, and was a guest on the Late Show with David Letterman. He shares his optimistic view on better understanding air pollution and global warming problems, and developing large-scale clean, renewable energy solutions for them.