Problem
Your neighbor faithfully applies fertilizer to his lawn to ensure beautiful, healthy green grass. Explain how your neighbor's fertilizing habit affects at least one nutrient cycle.
Your friend commutes to work every day by driving a standard gasoline-powered car. Explain how your friend's commute affects one or more nutrient cycles.
Urban areas typically have lots of pavement and compacted soils. Explain how these impermeable surfaces affect at least one aspect of the hydrologic cycle.