https://www.theguardian.com/environment/2019/nov/27/climate-emergency-world-may-have-crossed-tipping-points
"The world may already have crossed a series of climate tipping points,
according to a stark warning from scientists. This risk is “an
existential threat to civilisation”, they say, meaning “we are in a
state of planetary emergency”.
Tipping points are reached when particular impacts of global heating
become unstoppable, such as the runaway loss of ice sheets or forests.
In the past, extreme heating of 5C was thought necessary to pass tipping
points, but the latest evidence suggests this could happen between 1C
and 2C.
The planet has already heated by 1C and the temperature is certain to
rise further, due to past emissions and because greenhouse gas levels
are still rising. The scientists further warn that one tipping point,
such as the release of methane from thawing permafrost, may fuel others,
leading to a cascade."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://www.xanadu.com.au/ Chief Scientist, Xanadu
http://www.glasswings.com.au/ Partner, Glass Wings
http://www.sericyb.com.au/ Manager, Serious Cybernetics
