Earth’s carbon dioxide levels at highest point in 800,000 years

Carbon dioxide reached its highest level in recorded history last month, at 410 parts per million. This amount is highest in at least the past 800,000 years, according to the¬†Scripps Institute of Oceanography¬†at the University of California, San Diego. When records started in 1958, the levels were 315ppm. Since then, there has been nearly a […]