Plants are being exposed today to higher atmospheric carbon dioxide concentrations then they have been for the last two million years. The authors look at global warming research specifically in terms of the response of plants to increased carbon dioxide levels. L.H. Allen Jr., M.B. Kirkham, D.M. Olszyk, and C.E. Whitman, ed. Softcover, 228 pages, 1997; ASA, CSSA, and SSSA. ASA Spec. Publ. 61. ISBN: 0-89118-133-4. Item Number: B40314.
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