Last time CO2 levels were this high, sea levels were 60 feet higher and Antarctica had trees

The last time carbon dioxide levels in the atmosphere were as high as they are today, sea levels were 60 feet higher and it was so warm that trees grew in Antarctica. Current CO2 levels of 410 parts per million (ppm) were last seen on Earth three million years ago, according to the most detailed … Continue reading Last time CO2 levels were this high, sea levels were 60 feet higher and Antarctica had trees