The Geological Society of America [GSA] and geologists have a primary concern with historic climate and are therefore in a better position than most other professions to evaluate the causes and impacts of present climate changes. We have examined the evidence put forward by the IPCC in favor of human influences on global climate during the 20th century but find none of the evidence cited as compelling. While there has been some warming in the 20th century, and also a lengthy cooling period (1940-75), there has been no perceptible warming during the 21st century. But since climate historically has always warmed and cooled on various cycles, we fully expect to see some warming later in the century, caused by the same natural forcing that has caused climate to fluctuate in the past.
We believe, and evidence supports this, that a warmer climate is on the whole beneficial to human health and endeavors, esp. for agriculture and forestry; hence we see no need to attempt climate modification of any kind. In addition, CO2 is a natural fertilizer for plants, and higher CO2 levels are desirable; historic levels have been many times higher than today’s. Adaptation to climate changes has been the human norm during ice ages and interglacials and will continue to be the primary mechanism. Finally, we see no need to modify energy policy in response to fears of climate change -- although we do support energy conservation and the development of alternative energy supplies in anticipation of the gradual depletion of readily available fossil fuels.
Click to read PDF download "Alternate GSA Position Statement by Atmospheric physicist S. Fred Singer"