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globalchange

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population(3)
erosion(2)
forests(2)
loess(2)
conservation(1)
denitrification rate(1)
density(1)
emissions(1)
grasslands(1)
heat(1)
humidity(1)
nitrogen(1)
particulate matter(1)
public health(1)
rural areas(1)
solar radiation(1)
urban areas(1)
vegetation(1)
velocity(1)