Study Measuring Earth’s Vital Signs Warns of Climate Tipping Points.
'The authors say tropical coral reefs, the Amazon rainforest, and the West Antarctic and Greenland ice sheets may have passed dangerous tipping points.' ... with links to research papers.
(Smithsonian Magazine, USA) >

https://www.smithsonianmag.com/smart-news/study-measuring-earths-vital-signs-warns-climate-tipping-points-180978320/