PDS AP Environmental Science 5th Period 2010-11

How is nitrogen dioxide both a primary and a secondary pollutant?

Are there any effects of the depletion of stratospheric ozone besides UV radiation causing skin cancer?

Is SO2 a secondary or primary pollutant? I was confused when reading over my notes.

Could someone explain to me how each happens in plain English?

Also, what is each used for in the process of making nuclear energy?

I have in my study guide the phrase carbon neutral as part of the benefits of biomass energy, and I was hoping someone could remind me of what that is because I don’t have a description to go along with it, and I don’t remember what the phrase means.

The book says that certain factors such as fishing in deeper waters, fishing off shore, and spending more time fishing mask population declines in fisheries and indicates stability. I’m confused because wouldnt all of these factors indicate that fish numbers are declining? Shouldn’t fishing in deeper waters indicate that we must go to deeper waters as a result of less fish in shallow waters?

We saw in the video today the benefits/downsides to aquaculture. Were there any laws we needed to know for the test that regulated industrialized fishing or that promoted aquacultures?

How exactly does saltwater mix with aquifers when groundwater is overpumped? Is it from the pressure of pumping the water up or something else and how exactly does it occur?

I know we talked about NPP per meter squared and total NPP for aquatic life zones in the fall but I cannot remember which one had the highest.

So I know what terracing and contour farming are, but I feel like besides the fact that terracing is more like steps they are basically the same. Is there any difference really between the two because they both seem to be the same idea of forming strips that are perpendicular to the slope on a hill or mountain to help avoid erosion, so why choose one over the other?