summary - Over the next 100 to 200 years, carbon dioxide concentrations in the Earth's atmosphere will head towards values not seen since the Triassic period, 200 million years ago. Furthermore, by the 23rd century, the climate could reach a warmth not seen in 420 million years, say researchers.
Wednesday, April 05, 2017
Global Warming - Heat Not Seen In 420 Million Years
Science Daily: Future carbon dioxide, climate warming potentially unprecedented in 420 million years