Soil nutrients are remarkably sparse in the , considering the overall high levels of biomass.

Why does physical weathering speed up the processes of chemical weathering? a) physical weathering requires abundant water, as does chemical weathering. b) physical weathering produces fresh surfaces for chemical weathering to attack. c) chemical weathering can occur only on small surfaces, not large ones. d) chemical weathering requires salt, which is provided by salt wedging.

Bottle deposit programs are one way to encourage higher recycling rates. explain how they work

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