The notable environmentalist born in 1968 is Bill McKibben. He has emerged as a prominent voice in the fight for sustainability and climate action. McKibben is the founder of 350.org, a global grassroots movement aimed at addressing climate change by reducing atmospheric carbon dioxide levels. His numerous books and articles have helped raise awareness about environmental issues, and he has been actively involved in various climate campaigns and activism. A passionate advocate, McKibben emphasizes the urgency of transitioning to renewable energy sources and has mobilized countless individuals to take action against climate change.