A global group of around 11,000 scientists has endorsed research that says the world is facing a climate emergency.
The study, based on 40 years of data on a range of measures, says governments are failing to address the crisis.
It says without deep and lasting changes, the world is facing "untold human suffering".
BBC News reports the researchers to say they have a moral obligation to warn of the scale of the threat.
So the authors include a range of data which they believe represents a "suite of graphical vital signs of climate change over the past 40 years".
These indicators include the growth of human and animal populations, per capita meat production, global tree cover loss, as well as fossil fuel consumption.
[Source:BBC]
