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geography,
terrestrial-atmosphere exchange of trace gases,
atmospheric chemistry and composition,
halogen biogeochemistry,
stratospheric ozone depletion issues,
coastal salt marsh,
chaparral,
desert,
tundra,
boreal forest,
grassland
Islam,
development,
Africa,
social movements,
political economy,
political ecology,
geography,
South Asia,
peasant societies,
social and and cultural theory,
U.S. agriculture,
Marxian political economy