
United Nations @UN
The shrinking of Arctic sea ice affects marine ecosystems and ocean circulation and can potentially impact weather events. +1.5°C = ice-free summer every 100 years. +2°C = ice-free summer every 20 years. Every fraction of a degree matters. https://t.co/CDodr6OuCK via @UNFCCC https://t.co/lfBKNdsoDj — PolitiTweet.org