For millions of years global warming has maintained a liveable climate on Earth. The atmospheric temperature, though constantly changing, has never exceeded a bearable level.
This is mainly due to the life-sustaining water-cycle which acts as a thermostat. The stages of evaporation and condensation have a cooling effect which under unusual conditions created the ice ages.
As a warmer atmosphere holds more water vapour there is greater cloud cover and rainfall, significant features of natural temperature control.
Human activity may have added warming gases to the air but as in the past, nature will cope with any temperature change.
HUGH WILSON
Rotorua