EarthPlanet Earth has 9 safety limits and we’ve already exceeded 4 of them A decade ago, Johan Rockström identified the limits to Earth's life support systems. From chemical pollution to climate change, we're veering into the danger zone - so why is he (cautiously) optimistic about the future? Features
EarthThe instability of past ecosystems shows we must cut emissions now A model of how Earth has responded to climate changes over the past 800,000 years reveals just how sensitive our planet is to change Leader