Did climate change only really start in the early 90s

sparky

Ad Honorem
Jan 2017
5,667
Sydney
global warming is a trend in a chaotic weather system
it's less one particular year than the overall limits over decades
as such the proxies give a better view of changes , and not only with CO2 either
 

sparky

Ad Honorem
Jan 2017
5,667
Sydney
the last episode of Climate change can absolutely be dated at 14.500 BC
human caused global warming is noticeable from 1980