Quote Originally Posted by harrybarracuda View Post
Yes but examination of ice bores allows them to get hard historical data going back thousands of years, so they know what the CO2 levels have been over that period, and can tie it to historical events such as volcanoes.

Not quite sure what your point about mining is though. How is that relevant, other than as another example of profit going before people?
The mining point demonstrates that, for generations, humanity has taken natural resources for granted, and damn the consequences of such exploitation.
Now all and sundry are on the backs of the Chinese et al, for irresponsible coal mining. Hypocritical set of standards applied by the west. The USA reducing mountains to sea level in order to exploit coal. No standards at all.
The least the climate change lobby could do is to apply standards consistently.