You're talking of billions of deaths from famine and conflict from displacement. Should young people not be alarmed about the idea of a few hundred of millions of humans relegated to the poles of the Earth because the species was too stupid to stop destroying their own planet?
If we can't prevent - or based on comments here, completely reject the reality of - the massive and preventable degradation of the only habitat in known universe where we can survive then we are in fact quite doomed.
The Kyoto Protocol, first international treaty designed to limit greenhouse gas emissions, was signed in 1997. Since then greenhouse emissions have grown by 50% and global population has grown by 25%. What prevention measures are you proposing, and why did they utterly fail to reverse the catastrophic growth trend in the past 25 years?
If we can't prevent - or based on comments here, completely reject the reality of - the massive and preventable degradation of the only habitat in known universe where we can survive then we are in fact quite doomed.