Editorial
Trying to Understand Interactions Among Isoprene, Ozone and Methane within the Context of Rising Air Temperatures and CO2 Concentrations: The more the problem is studied, the more difficult its solution appears to become.

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from the Southern Swedish Scandes.

Subject Index Summary
Drought (Europe): Have droughts become more frequent or severe in Europe in response to 20th-century global warming?

Journal Reviews
"High-Performance" Algal Symbionts of Corals: It pays for new coral hosts to carefully choose -- and as quickly as possible -- the algal endosymbionts to whom they will rent their living quarters.

The Swimming Performance of Atlantic Cod: How is it likely to be affected by rising atmospheric CO2 concentrations?

Larch Budmoth Outbreaks in the European Alps: How have they varied over the past three centuries? Or make that twelve centuries.

Effects of Global Warming, Atmospheric CO2 Enrichment and Technological Innovations on Bean and Maize Yields in Brazil: What are they?

Within-Species Genetic Differences in Quaking Aspen and Their Responses to Elevated CO2: What are they? ... and what are their implications?