RT @KHayhoe: This iconic graph tracks how rapidly our planet is warming. Yet every time it's shared on Twitter, someone always asks, "Why does it begin in 1850?"

The answer is simple: it's when we first had enough thermometers to compute a truly representative global temperature average. https://t.co/2d3SaI2lCP

🐦🔗: https://n.respublicae.eu/ParHolmgren/status/1656869339142713344