Eric Geller @ericgeller
252 million years ago: 1️⃣ Massive volcanism 2️⃣ Magma ignites fossil fuel deposits 3️⃣ Colossal greenhouse gas emissions 4️⃣ Largest known extinction event Human activity has replaced 1️⃣ and 2️⃣, causing a smaller version of 3️⃣. What's next? https://t.co/CpjPz2eano https://t.co/P3VhYMkAkj — PolitiTweet.org