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hpu
ncs2200
earth science
earthscience
global climate change
air pollution
atmosphere
ncs220
plate tectonics
eartrh science
climate data
earth sciecne
earth scence
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function
structure
earth science ocean pollution
water pollution sources
water treatment
water pollution
eath science
wetlands
oceans and esturaries
water resources
water resourcesr8u6ft5
topography
soil formation
weathering and erosion
energy resources
mineral resources
rocks and minerals
geologci time
lithosphere
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