Climate Change


In the last century, growth in human population has increased energy use. This has contributed additional carbon dioxide (CO2) and other gases to the atmosphere. Although the AAPG membership is divided on the degree of influence that anthropogenic CO2 has on recent and potential global temperature increases, AAPG believes that expansion of scientific climate research into the basic controls on climate is important.


Geologists study the history of the earth and realize climate has changed often in the past due to natural causes. The earth’s climate naturally varies continually, in both directions, at varying rates, and on many scales. In recent decades global temperatures have risen. However, our planet has been far warmer and cooler today than many times in the geologic past, even within the past 10,000 years.

  • AAPG supports expanding scientific climate research into the basic controls on climate specifically including the geological, solar, and astronomic aspects of climate change. Research should include understanding causes of past climate change and the potential effects of both increasing and decreasing temperatures in the future. This research should be undertaken by appropriate agencies involved in climate research and their associated grant and contract programs.
  • Certain climate simulation models predict that the warming trend will continue, as reported through National Academy of Sciences, American Geophysical Union, American Academy for the Advancement of Science, and American Meteorological Society. AAPG respects these scientific opinions but wants to add that the current climate warming projections could fall within well-documented natural variations in past climate and observed temperature data. These data do not necessarily support the maximum-case scenarios forecast in some models.
  • AAPG supports research to narrow probability ranges on the effect of anthropogenic CO2 on global climate.
  • AAPG supports reducing emissions from fossil fuel use as a worthy goal. (However, emission reduction has an economic cost, which must be compared to the potential environmental gain.)
  • AAPG supports the premise that economies must retain their vitality if they are to be able to invest in alternative energy sources as fossil fuels become more expensive.
  • AAPG supports the pursuit of economically viable technology to sequester carbon dioxide emissions and emissions of other gases in a continuing effort to improve our environment and enhance energy recovery.
  • AAPG supports measures to conserve energy.
Learn more:

Read AAPG's publication that further discusses worldwide climate. The first chapter of Geological Perspectives of Global Climate Change is provided here as a PDF. You may order this book, ST47 - Geological Perspectives of Global Climate Change, SB edited by Lee Gerhard, William Harrison, and Bernold Hanson through the AAPG Store.

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Office Contacts

Edith Allison Director, Geoscience and Energy Policy Office +1 202 643 6533