Ever wonder what’s bothering Al Gore? Worrying too much about catastrophic global warming is not good for your mental health, according to new research from Germany.

Because global warming is a global issue that requires international cooperation, it can leave the individual activist with a sense of powerlessness, leading to a condition called “doomer-depression.”

The German publication TAZ reports that because the doomsday scenarios surrounding global warming have been around for decades, researchers are finding that such scenarios are causing depression on a global scale. Furthermore, it is making more people complacent when it comes to acting on global warming.