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In paragraph C, we refers to ________.

Which of the following is true about helium rain?

Even after wastewater is treated and nitrogen is removed, urban areas contribute to poor water quality in urban streams.  Name two pollutants or causes of poor water quality that come from urban areas. 

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The addition of impervious surfaces is a common feature of urbanization.  Impervious surfaces seal the soil by not letting water, organic material, or oxygen in.  Discuss how impervious surfaces affect the cycle below.   Water cycle:  Identify two fluxes altered by impervious surfaces.  Say whether each is increased or decreased and explain why.  (6)

In the Gregg et al. 2003 paper, why did the cottonwood trees show 50% greater biomass in New York City (NYC) than in the surrounding rural areas?

The addition of impervious surfaces is a common feature of urbanization.  Impervious surfaces seal the soil by not letting water, organic material, or oxygen in.  Discuss how impervious surfaces affect the cycle below.   Nitrogen cycle: Identify two fluxes altered by impervious surfaces.  Say whether each is increased or decreased, explain why, and be sure to state which specific molecules are involved.  (8)

The addition of impervious surfaces is a common feature of urbanization.  Impervious surfaces seal the soil by not letting water, organic material, or oxygen in.  Discuss how impervious surfaces affect the cycle below.   Carbon cycle: Identify two fluxes altered by impervious surfaces.  Say whether each is increased or decreased and explain why.  (6)

Which aspect of the surface energy budget would be the most influenced by the latitude of a city (e.g. whether it’s located closer to the equator or to a pole)? 

Activation of gamma motor neurons results in: