The Roman Empire was large enough to cause lead pollution in Greenland, as revealed by an ice core. The civil wars that ended the Roman Republic, as well as the collapse of the Roman Empire, are identified by drops in lead pollution. User drewiepoodle, in the Environment subreddit, 16 May 2018
Lead pollution recorded in Greenland ice indicates European emissions tracked plagues, wars, and imperial expansion during antiquity User eleitl, in the Low-volume, low-noise, moderated discussion of our coming collapse subreddit, 15 May 2018
Lead pollution recorded in Greenland ice indicates ancient Roman emissions like plagues, wars, and imperial expansion. User Alkaladar, in the Ancient Rome - The Kingdom, Republic & Empire subreddit, 15 May 2018
The Roman Empire was large enough to cause lead pollution in Greenland, as revealed by an ice core. The civil wars that ended the Roman Republic, as well as the collapse of the Roman Empire, are identified by drops in lead pollution. User worldnewsbot, in the News From Around The World subreddit, 15 May 2018