Editorial
Reactive Nitrogen in the Biosphere: Too Little or Too Much?: Which is it? Too little? Too much? Or neither of the above?

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from Glacier du Miage, Mont Blanc, Western Alps, Italy.

Subject Index Summary
Salinity (Effects on Plants): Do high soil salinities interfere with the biological benefits of atmospheric CO2 enrichment?

Journal Reviews
Aerosol Impacts on Earth's Climate: How well are they known?

The "Little" Medieval Warm Period in Southeast Tibet: Was it warmer or cooler than it was in the late 20th-century?

Snow-Induced Forest Damage in Finland: Climatic Change actually publishes a study suggesting a positive outcome of global warming.

The Spreading of the Bluetongue Virus Throughout Europe: Has it been driven by global warming, as some have claimed?

Nitrogen Deposition Boosts U.S. Tree Growth: And it boosts it quite a bit.