30M views · 127K reactions | Rising sea levels, devastating disasters, fires burning at record rates, and threats of food shortage – as 2019 marks the end of the hottest decade on record, CNN recaps some of the catastrophic effects of climate change this year across the globe. | CNN | Facebook

Nearly 120 world leaders gathered in Glasgow to address what scientists and health experts say is the world's biggest crisis: climate change. CNN's Wolf Blitzer reports. | CNN