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Volume 10 Number 45:  7 November 2007

Editorial
20th-Century and Medieval Droughts: Differences, Similarities and Implications: An important new study ties together some significant loose ends that cut right to the heart of the CO2-climate debate.

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from Nansen Fjord, Eastern Greenland.

Subject Index Summary
Growth Response to CO2 with Other Variables (Disease): Can the ongoing rise in the atmosphere's CO2 concentration do anything to ameliorate the negative consequences of the various diseases that afflict the world's plants, including those maladies that weaken and kill the crops upon which we depend for our sustenance?

Journal Reviews
The 1680-2003 Fire History of Southeastern Quebec, Canada: Have forest fires in this part of the world intensified or become more subdued in response to post-Little Ice Age warming?

A Six-Century Streamflow Reconstruction for China's Yellow River: What does it suggest about the river's major "dry-ups" of the late 1990s?

Plant Stomatal Response to Volcanogenic SO2: What is it? ... and what is its primary significance?

Effects of Atmospheric CO2 Enrichment on Vegetative Productivity: Have they been over-estimated by enclosure studies?

Herbivores vs. Oak Trees in a CO2-Enriched Atmosphere: Which receives the advantage compared to the situation that prevails in ambient air?