Editorial
The Gospel According to Sir John: Chapter 4: We discuss yet another important reason why biofuels are not the answer to reducing anthropogenic CO2 emissions.

Medieval Warm Period Record of the Week
This issue's Medieval Warm Period Record of the Week comes from Estanya Gran Lake, Pre-Pyrenees, Spain.

Subject Index Summary
Nitrogen Fixation (Aquatic Plants): How significant is it? And how is it likely being impacted by the ongoing rise in the air's CO2 content?

Journal Reviews
The Turn-of-the-20th-Century North American Drought: What caused it?

Non-Greenhouse-Gas Anthropogenic Influences on Near-Surface Air Temperatures: Have they been properly removed from global climate databases?

A Five-Century Borehole Record of Australian Temperatures: What important evidence does it present?

Peatland Carbon and Global Warming: Is there a tendency for peatlands to sequester ever less carbon -- or lose increasingly more of it to the atmosphere -- as the planet warms?

Forest Fires in the Western United States: Are they increasing in response to CO2-induced global warming?