It's happening. Reportedly supplies of the ubiquitous Christmas evergreen are falling as a consequence of rapid global warming.
Climate instability means tree farmers no longer know what to expect and consequently will leave the dicey business if they can.
That's bad in itself. Plant biologist Clint Springer, of Saint Joseph’s University, explains:
We've decided we have to forego a tree altogether this year; Morty the cat is an inveterate, uncontrollable climber. A tree wouldn't last long. But I'll be sad if we're coming into a time when this indulgence in northern European winter rites is entirely replaced with plastic.