Re Crowbar's chart.
CO2 not been higher for 120 000 years.

The dangerous increase due to industrialisation has only occurred over last 100 years and can not be seen on the chart because the time scale is so large.

There is now no scientific dispute about the reality of global warming due to human activity.

The fear now is of reaching a tipping point wherafter reduction in emmissions will not prevent a runaway catastrophic change. The Amazon forest becomes savannah and millions of tons of methane are released by melting permafrost.