In the long term, over the last half billion years or so, has there been any correlation between the percentage of carbon dioxide in the air and the average temperature of the planet? - John Wilson

https://www.quora.com/In-the-long-term-over-the-last-half-billion-years-or-so-has-there-been-any-correlation-between-the-percentage-of-carbon-dioxide-in-the-air-and-the-average-temperature-of-the-planet/answer/John-Wilson-242