A few more air pollutants of note: Lead VOC’s (volatile organic compounds) Particulates CFC’s (see ozone)
As Wallace Broecker likes to say, the Earth's climate system is "an angry beast“Wallace Broecker and “one that we should not be poking with sticks.”
Carbon dioxide and temperature – a ‘chicken and egg’ problem.
Other historical indicators: reduction in sea ice; retreat of valley glaciers; earlier lake ice melt; warming of permafrost; etc.
The ‘Keeling Curve”
source: El Nino impacts?
source:
ENSO – El Nino Southern Oscillation
source:
ENSO – El Nino Southern Oscillation