I wasn't alive then, so can't judge on that. I can however see the obvious changes that are happening, and the trends. Nobody serious is saying the planet will become uninhabitable, but swathes of it will. Wildfires, heat domes, massive floods are events that are getting more frequent. Texas's "once in a hundred years" winter that now has occured twice in 10 years; the massive floods in China and Germany; the heat and now cold waves that have hit Europe in the past few years. Burying your head in the sand won't make all that go away.