Leading scientists on Thursday called on the upcoming Rio Summit to grapple with environmental ills that they said pointed to "a humanitarian emergency on a global scale."
In a "State of the Planet" declaration issued after a four-day conference, the scientists said Earth was now facing unprecedented challenges, from water stress, pollution and species loss to spiralling demands for food.
They called on the June 20-22 followup to the 1992 Earth Summit to overhaul governance of the environment and sweep away a fixation with GDP as the sole barometer of wellbeing.
"The continuing function of the Earth system as it has supported the wellbeing of human civilisation in recent centuries is at risk," said the statement issued at the "Planet Under Pressure" conference.
"These threats risk intensifying economic, ecological and social crises, creating the potential for a humanitarian emergency on a global scale."