annual global soil loss = 20 to 100 tons/acre/yr (~10 9 tons/yr) in California, soil is eroding 80 times faster than it is being replenished agents of erosion - wind, water, ice . . . . . .
(soil; is eroding faster; ) (it; is being replenished; agents of erosion - wind, water)
soil it
is eroding faster is being replenished
agents of erosion - wind, water