What book did you get that out of? One from the sixties, no doubt, due to underfunding of your public school, or perhaps "quality" homeschooling...
As I've posted elsewhere, many times in these discussions:
Because isotopic fractions of the heavier oxygen-18 (18O) and deuterium (D) in snowfall are temperature-dependent and a strong spatial correlation exists between the annual mean temperature and the mean isotopic ratio (18O or D) of precipitation, it is possible to derive ice-core climate records. The record based on an ice core drilled at the Russian Vostok station in central east Antarctica was obtained during a series of drillings in the early 1970s and 1980s and was the result of collaboration between French and former-Soviet scientists. Drilling continued at Vostok and was completed in January 1998, reaching a depth of 3623 m, the deepest ice core ever recovered . The resulting core allows the ice core record of climate properties at Vostok to be extended to about
420,000 years.
The strong correlation between atmospheric greenhouse-gas concentrations and Antarctic temperature,is confirmed by the extension of the Vostok ice-core record. From the extended Vostok record, scientists have concluded that present-day atmospheric burdens of carbon dioxide and methane seem to have been unprecedented during the past 420,000 years. Temperature variations estimated from deuterium were similar for the last two glacial periods.
You can see a lot about it
here, because we don't just "disagree," or "agree to disagree":
I'm
right, and you're
wrong.
And, er....everyone here knows who I am, and what I've done for my career. You should have a look, and start basing scientific arguments on scientific facts, instead of ....whatever it is you're basing them upon.