Why did Prince Harry and Meghan, the Duke and Duchess of Sussex, announce they want to take a break from their family? Was it racism, the generation gap, or self-made Meghan not fitting in? Circumstantial evidence points to another reason: differences in how Prince William and Harry approach saving the planet.

Over the festive season, British followers of the royal family could read the usual about whom the queen favored in her Christmas lunch speech, whether an aged Prince Philip would make it to church, how adorably little Princess Charlotte interacted with members of the public during her prechurch walk.