I was promised that everyone on earth would die by the year 2000 when CO2 reached 0.04%
1970 - Air pollution and over population will create a new ice age and global famine that will kill 100 - 200 million people per year. (Paul Ehrlich)
2021 - Awww, fug it! So all of our predictions for the past 50 years (new ice age, mass starvation, nuclear war, global warming, SARS, zombies, asteroid impacts, solar flares, and COVID) were total bullsh!t, but we are absolutely 100% sure that everybody is doomed in the next 10 years due to some unknown climate emergency unless you give us unlimited amounts of cash and do exactly what we say. You can trust us because we’re scientists and the science is settled.
Think that about sums it up. Aside from an alien invasion, is my list missing anything?