Did you ever notice that the changes are always fairly drastic, always negative, and always within most reader’s lifetimes?
That last part is for effect, because they know people would be less likely to be scared into.... whatever it is that these people want you scared into... if it was centuries out.
But you’ll also notice, all the predictions of the last several generations failed to produce such drastic and negative results. That’s the pitfall of propaganda. Getting proved wrong if you don’t extend out your predictions long enough.
... and if you go back far enough, like the “New Ice Age” alarmists of many decades ago, by the time the people who make this propaganda are exposed, they are either dead, or no longer have a career to be threatened
This global climate change “science” has become a new religion—never changing their story when their prophecies fail.
At this point they are just a stupid cult.