The Center for Biological Diversity has a very successful campaign linking human population growth to other species loss. They sell "Endangered species condoms." Their creative approach has now been independently recognised by, of all things, the American Advertising Federation. Good on them!
impact of overpopulation
The overpopulation poses at least two problems:
(1) The excessive growth of humanity destroying natural systems across the globe. Five selfish and delinquent countries contribute to nearly 50% of the world's population (notably China, India, USA, Indonesia and Brazil).
Few are prepared to admit when they are wrong, so then why has this expression become a cliché?
Humans as animals have a survival instinct and so by extension are naturally defensive of criticism. They will defend their actions to the hilt, despite the surrounding damage they knowingly cause. Modern 'progressive' Man (humans) even more arrogantly proclaims that the world without human endeavour would be a wasteland.