Just recently I tried to list the reasons for grave concern that I had seen in my lifetime - and which I now look upon as just as many fashionable doom scenarios. That list was all but exhaustive.
How about this?
The post-war years of bad weather: nuclear tests.
Already mentioned: 1972 the limits of growth. The worst of which was expected was to emerge in... 2000, thank you very much.
70s and 80s panic, we're heading for a new ice age. Forgotten.
Followed by acid rain and forests dying. Forests look better than ever.
The hole in the ozone layer. Still there at the end of every summer, like it may have always been, before we started measuring.
And now that terrible CO2. Studies have shown that in the atmospere there is 0,04 volume percent of CO2. It is argued that a fraction of this fraction has to do with human activity.
Go see the fascinating films about climate change at the Friends Of Science site, and see if we need to be concerned about climate change.