What are the sources of carbon emissions by region?	What are the sources of carbon emissions by region?
Which countries are the largest carbon emitters? How do their emissions compare to Kyoto Protocal levels?	Which countries are the largest carbon emitters per capita? How are their emissions levels changing?
How does carbon flux from land use changes vary by region?	How does transportation vary by country?
How do modes of passenger transportation vary by country?	How do modes of freight transportation vary by country?
How are vehicles and fuel economy changing in the US?	How are passenger kilometers and freight metric ton kilometers changing?
What are the sources of methane emissions?	Can gas emissions be controlled?

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