Brian von Herzen
Brian von Herzen, Ph.D., Executive Director, Climate Foundation, +1.650-942-9630 WhatsApp
http://www.climatefoundation.org/
NASA modeling has determined that carbon levels above 350 ppm are incompatible with sustaining a planet similar to that on which civilization has developed and to which life on Earth is adapted (James Hansen). In May, 2019, the Keeling curve exceeded 415 ppm for the first time in recorded history.