Nitrogen and sulfur: describe question

Describe the following aspects of nitrogen chemistry:

a) the lack of reactivity of $\ce{N2}$ under normal conditions, with reference to bond strength and polarity; b) the basicity of $\ce{NH3}$ according to the Brønsted–Lowry theory, including the formation of the ammonium ion; c) the displacement of $\ce{NH3}$ from an ammonium salt by a base; d) the natural and anthropogenic sources of nitrogen oxides ($\ce{NO}$ and $\ce{NO2}$) and their roles in: i) the formation of acid rain, including the catalytic oxidation of $\ce{SO2}$; ii) the formation of peroxyacetyl nitrate (PAN) as a component of photochemical smog.