OPEN LETTER
Open Letter to the InterAcademy Council: On August 30th, the InterAcademy Council released a report reviewing the processes and procedures followed by the IPCC in compiling its Assessment Reports. This letter by our Chairman has been penned in response to their findings.

Editorial
The Costs of Free Energy: Like the "free lunch," free energy is not exactly what it's made out to be.

Subject Index Summary
Ocean Acidification (Effects on Marine Animals: Miscellaneous): A hodge-podge of miscellaneous sea creatures have been scrutinized for their responses to "ocean acidification." What do the studies reveal?

Journal Reviews
Greenland Temperatures of the Past Millennium Based on Nitrogen and Argon Isotopic Ratios: An impressive new study testifies to the reality of the Medieval Warm Period and Little Ice Age.

The Naturally Oscillating Climate of Northern Norway: Fjord sediments reveal the four major cool and warm periods of the last 1500 years.

The Temperature Sensitivity of Global Biospheric Respiration: Terrestrial ecosystem respiration was long believed to increase strongly with temperature; but that is now believed no longer.

The Power of Acclimation: How Trees Respond to Warming in Natural Settings: Are the air temperatures at which different tree species optimally photosynthesize firmly fixed? ... or can they adjust their physiology to accommodate a modest warming? ... or maybe even a warming of the magnitude predicted by the world's climate alarmists?

The Effects of Warming on Alpine Vegetation in the Swiss Alps: They wouldn't be negative, would they?

Plant Growth Database
Our latest results of plant growth responses to atmospheric CO2 enrichment obtained from experiments described in the peer-reviewed scientific literature are: Couch Grass (Crous et al., 2010), Kentucky Bluegrass (Crous et al., 2010), and Smooth Brome (Crous et al., 2010).

Medieval Warm Period Project
Was there a Medieval Warm Period? YES, according to data published by 869 individual scientists from 516 separate research institutions in 43 different countries ... and counting! This issue's Medieval Warm Period Record comes from the Jinchuan Peat Marsh, Huinan County, Jilin Province, China. To access the entire Medieval Warm Period Project's database, click here.