Students will write a paper and give a 12-minute presentation (10-minute talk, 2 minutes for questions) during the last week of class. A list of possible topics is included below, or students can pick a topic of their own choosing. The paper should be at least 5 pages long (but no more than 10 pages) using ~1.5 line spacing and include at least 10 references, as well as figures to illustrate your points.

• Air pollution in mega-cities
• Air pollution and health
• Intercontinental transport of pollutants
• Geoengineeing
• Biogenic emissions of VOCs
• Secondary Organic Aerosol formation
• Composition of polar stratospheric clouds
• Biomass burning, and its effect on tropospheric ozone levels in tropical regions 
• Halogen chemistry in the marine boundary layer
• Ozone depletion events in the arctic boundary layer
• Is the global oxidizing capacity of the atmosphere changing?
• Satellite observations of tropospheric composition
• Satellite observations of stratospheric composition
• Lightning and the global NOx budget
• Recent trends in CH4
• Glacial-interglacial changes in CH4
• Planetary photochemistry
• Effects of aerosols on tropospheric ozone
• Cloud chemistry
• Formation of the stratospheric ozone layer in Earth's early atmosphere (~2 billion years ago)
• Mesospheric clouds
• Climate change - polar ozone depletion feedbacks
• Volcanoes and atmospheric chemistry
• The 2002 Antarctic ozone hole
• Sources of lead

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Presentation schedule (week of June 1):

Monday: Nicole, Kelly, Beth, Jennifer, Ed, Bryce

Wednesday: Ben, Pu, Yurong, Ting, Adam

Friday: Stuart, Jane, Bonnie, Tyler, Jack