The new lessons for October are:
Traffic Congestion Charging: Will It Improve Air Quality?
Students read an article introducing the concept of urban street canyons. Then they analyze congestion pricing data, discuss air pollution control methods, and present their findings.
http://www.ehponline.org/science-ed/2008/Congestion_Pricing.pdf
The Buffer Zone: Acid-Base Chemistry in the World’s Oceans
Students review introductory acid-base chemistry, conduct an experiment simulating ocean acidification resulting from excess atmospheric carbon dioxide (CO2), and discuss potential human implications of increased ocean temperatures and acidification.
http://www.ehponline.org/science-ed/2008/Buffer_Zone.pdf