Leaked copies of a new climate report said a swift withdrawal from coal and a global diet shift away from meat is needed to limit global temperatures rising.

Scientists and diplomats meeting in South Korea this week are scheduled to release the 400-page report describing a “complete transformation” of the current “climate mayhem.”

The draft suggests four pathways for policymakers to ensure carbon emissions peak no later than 2020, to allow the global economy to become ‘carbon-neutral’ by 2050.