Credit: Shutterstock It's the year 2300. Extreme weather events such as building-flattening hurricanes, years-long droughts and wildfires are so common that they no longer make headlines. The last groups of humans left near the sizzling equator pack their bags and move toward the now densely populated poles. This so-called "hothouse Earth," where global temperatures will … Continue reading …The Planet Is Dangerously Close to the Tipping Point for a ‘Hothouse Earth’… →