IPCC Exclusions And Inclusions Of Climate Mechanisms Are Both Failures

They only consider human influence since pre-industrial times, approximately 1750 A.D. but don’t explain or account for natural variability because their objective is link human industry with warming. Conveniently, global temperatures rose naturally from the nadir of the Little Ice Age in the 1680s. It is impossible to determine what portion of that change was due to CO2, let alone the human portion. Yet, we’re told they’re 90 percent certain that human CO2 causes almost all temperature change since the 1950s. It’s a conclusion a knowledgeable graduate thesis committee would reject completely; indeed, a supervisor of any ability wouldn’t allow it to reach that level. It’s a conclusion that should fail as a Grade XII paper.