I first heard about global warming in the late 1970s. It seemed very believable, as there had been a dramatic climate shift in the southwestern US – where I was living. (We didn’t know about the PDO at the time.)
By the late 1990s, winters in Europe had gotten so mild that it almost never froze in London. The grass was always lush green.
Around 2000, a drought struck the US southwest. Fires burned up vast areas of forest. I remember looking up at the cloudless skies and imagining all that heat trapped by the CO2.
But then something unexpected happened. The climate turned cold and snowy, and it became obvious that something cyclical had occurred – like in the 1930s (only much less severe.)
Some of us grew up, evolved and moved on. Others still cling to discredited theories of the past.