Tipping point graphic (IMAGE) Northern Arizona University Caption Graphic depicting the temperature tipping point at which Earth's plants will start decreasing the amount of human-caused carbon emissions they can absorb. Credit Victor O. Leshyk/Northern Arizona University Usage Restrictions Credit given to the institution License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.