This is the fourth edition of the Youth Supplement to UNFPA's State of the World Population Report. This Youth Supplement addresses climate change and young people, through the lens of what impact climate change is predicted to have, and what that will mean for young people's lives, livelihoods, health, rights and development. The Youth Supplement explores these issues because the young people of today will be standing in the frontline in the coming decades, meeting the challenges posed by climate change.