claim: The minute increase of anthropogenic CO2 in the atmosphere ( 0.008% ) was not the cause of the warming—it was a continuation of natural cycles that occurred over the past 500 years.
evidence: The introduction includes this statement : There is strong evidence that the warming of the Earth over the last half-century has been caused largely by human activity, such as the burning of fossil fuels and changes in land use, including agriculture and deforestation.