Climate skeptic's claim about CO2 levels, ice ages and animals misleads

Purported ice age data isn't nearly as clearcut as claimed, and plants and animals survive when CO2 levels are half of modern levels.

Related Keywords

United States ,Melbourne ,Victoria ,Australia ,Texas ,Ian Plimer ,Marcus Lofverstrom ,Ashleigh Hood ,Richard Alley ,Yige Zhang ,Twitter ,University Of Arizona ,Facebook ,Texasam University ,University Of Melbourne ,Pennsylvania State University ,Last Glacial Maximum ,Atmospheric Co2 Levels ,Tmospheric Co2 Concentrations ,Co2 Concentrations ,Ice Ages ,Plants And Animals ,Co2 Levels ,Usa Today ,Atmospheric Co2 Concentration ,Co2 ,Climate Change ,