In his NOAA laboratory Dr. Pieter Tans, of Boulder sits among some of the equipment used to air sample gathered throughout the world Thursday November 17, 2005 in Boulder. The air samples help understand the impact greenhouse effect. (MARIA J. AVILA/ROCKY
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Cancel Editmja, In his NOAA laboratory Dr. Pieter Tans, of Boulder sits among some of the equipment used to air sample gathered throughout the world Thursday November 17, 2005 in Boulder. The air samples help understand the impact greenhouse effect. (MARIA J. AVILA/ROCKY, [432731145] . Denver Public Library Digital Collections, accessed 19/03/2025, https://digital.denverlibrary.org/nodes/view/1004420