Andrew Glikson, an Earth and paleo-climate scientist, graduated at the University of Western Australia, conducted geological surveys of the oldest geological formations in Australia, South Africa, India and Canada; studied large asteroid impacts, including effects on the atmosphere and oceans and on mass extinction of species. Since 2005 he studied the relations between climate and human evolution and published books on the subject.
The current warming of Earth manifest in the Arctic Sea, the melting of polar ice sheets, penetration of snow storms into mid-latitudes, permafrost thaw, hurricanes and wildfires and the rise in extreme weather events, manifesting a shift in state of the atmosphere-ocean system, constitutes an existential threat to humanity and much of nature.
Traditionally political and economic negotiations aim at a compromise. Unfortunately, no negotiation is possible with the basic laws of physics and chemistry and with processes in the atmosphere-ocean-cryosphere system.