John Tamny explains the root cause of fears about global warming/climate change in his Real Clear Markets article Warming and Left Wing Professors Worry You? You Must Be Rich.  Excerpts in italics with my bolds and added images.

The 20th century called and it wants the word crisis back, the first half of the 20th century in particular. Back then crises were truly terrifying. Think two world wars that exterminated tens of millions of people, genocides of Jews and Armenians, global economic depression, tax rates that topped out at 90 percent, and so much more.

Fast forward to the present, and on relatively a quiet day (of which there are thankfully many) one of the most commonly expressed fears on the left concerns global warming born of fossil-fuel consumption. Without presuming to comment on the science here, what a luxurious worry. Back before innovators connected oil to the automation of work formerly done by humans, to cars, and eventually machines capable of cooling and/or warming our homes, weather extremes rendered the indoors and outdoors equally dreadful.

It’s too easily forgotten that air conditioners weren’t a market good until the 1930s, and once on the market, they retailed from $10,000 to $50,000. Fear of excess warmth or cooling care of appliances was well in the future, and worry about outdoor temperatures a likely byproduct of technology that made the indoors so livable. Put another way, if you fear warming or cooling outdoors it’s likely because you suffer neither indoors.

What does the past say about the present? It first signals that worry is hardly a modern concept. There’s always something. In our case, the somethings that have us up at night would have been viewed as positively luxurious by people who had worries of the world war, mass genocide, and back-breaking work kind that didn’t afford a lot of learning of any type. This isn’t to dismiss what has so many up in arms today, but it is to say that our “crises” are truly modern, and a rather bullish effect of immense prosperity.

See also 

Ungrateful Millennials Richer than Rockefeller