Speaking of the greenhouse effect, James, you might want to beef up
your background on the subject.
The Carbon Dioxide Greenhouse Effect
http://www.aip.org/history/climate/co2.htm
In the 19th century, scientists realized that gases in the
atmosphere cause a "greenhouse effect" which affects the
planet's temperature. These scientists were interested
chiefly in the possibility that a lower level of carbon
dioxide gas might explain the ice ages of the distant past.
At the turn of the century, Svante Arrhenius calculated that
emissions from human industry might someday bring a global
warming. In 1938, G.S. Callendar argued that the level of
carbon dioxide was climbing and raising global temperature,
but most scientists found his arguments implausible. It was
almost by chance that a few researchers in the 1950s
discovered that global warming truly was possible.
In the early 1960s, C.D. Keeling measured the level of carbon
dioxide in the atmosphere: it was rising fast. Researchers began
to take an interest, struggling to understand how the level of
carbon dioxide had changed in the past, and how the level was
influenced by chemical and biological forces. They found that the
gas plays a crucial role in climate change, so that the rising
level could gravely affect our future. (This essay covers only
developments relating directly to carbon dioxide, with a separate
essay for Other Greenhouse Gases.