Climate Change Is a Tick’s Best Friend

As climate-induced warming has altered the planet ecosystem, tick populations, long known to be carriers for the Lyme bacterium, are expanding the world over, nurtured by earlier and longer springs. While Pfeiffer is clear that we don’t yet know whether climate change is solely responsible for this expansion, evidence abounds that human-induced global warming is helping it along—something the U.S. government codified in its own climate models years ago.