Editorial
The Large-Scale Production of Biofuels in a Food-Insecure World: It will do us much more harm than good.

Subject Index Summary
Acclimation (Tree Species: Citrus): Do citrus trees gradually lose the growth advantage conferred upon them by higher atmospheric CO2 concentrations?

Journal Reviews
Rapid Ice Loss on the Antarctic Peninsula: How unprecedented is it?

Climate and Fire in Sonoran Grassland and Desert Scrub: How are the two related? ... and what does the result suggest about the future?

A 1300-Year History of West-Central Mexican Cloud Forest Climate: What does it reveal about drought? ... and what does it imply about the Medieval Warm Period?

The Response of Heterotrophic Soil Respiration to Warming: Does it increase or decrease? ... or is it pretty much unaffected by higher temperatures?

Microbial Physiology Impacts Soil Carbon Response to Warming: How may it occur? Let us count the ways.

Medieval Warm Period Project
This issue's Medieval Warm Period Record comes from Mt. Zarumori, Northern Japan.