Over the past century, enormous progress has been made in improving human welfare worldwide, thanks to quantum leaps in technology, rapid urbanization, and innovations in production systems. Yet immense challenges remain. Billions of people still face pervasive poverty, gross inequalities, joblessness, disease, and deprivation. In addition, the impacts of this progress on the environment, specifically those of climate change, are already being felt and will continue to intensify.
Photo:Â Bobby Haas/National Geographic Creative
