Editorial
Young Forest Stands Exposed to Elevated CO2 and Ozone: The Importance of Long-Term Studies: Are root biomass responses after seven to ten years of elevated CO2 and ozone exposure the same as those observed in the first five years of growth in these conditions?

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from Taravilla Lake, Central Iberian Range, Spain.

Subject Index Summary
Agriculture (Species - Alfalfa): How is the alfalfa plant affected by increasing concentrations of atmospheric CO2?

Journal Reviews
Estimating 21st-Century Sea Level Rise: How do James Hansen's wild ideas stack up against more rational analyses?

Last Glacial Maximum and Little Ice Age Atmospheric Circulation Characteristics Over the Mediterranean Sea: How similar or different were they?

The Little Ice Age in the Tropical Andes of Bolivia: How similar was it to the Little Ice Age in Europe? ... and why is the answer important?

Less Frequent but More Extreme Rainfall Events in Semi-Arid Grasslands: Is the global-warming-induced precipitation change good or bad for plant productivity?

Global Warming and Wildfires: Have rising temperatures been promoting the occurrence of larger and more frequent wildfires around the world?