The Pleistocene epoch, a time of incredible warmth at pre-industrial levels of CO2.

The recent geologic record highlights how complex climate is and suggests that we should have no reasonable expectation of a change in temperature to a reduction of atmospheric GHG concentration.

The divisions of geologic time…

Geologic time is divided into a hierarchical system of units that represents the vast expanse of Earth's history. The primary divisions are based on significant events and changes in the Earth's geological, biological, and climatic records. The traditional divisions of geologic time are as follows, from largest to smallest: