Opportunity Cost
From New York City Councilman James Genarro's web site:
Gennaro has received numerous accolades for his work as Chairman of the Council's Committee on Environmental Protection, and has authored many of the Council's most progressive environmental bills. Gennaro has spearheaded efforts to cut the city's global warming pollution emissions,... put more "clean air" vehicles on city streets, ...make the city's electricity more reliable, clean, and affordable,... and promote "green buildings".
Thinking about the public and private resources invested in these efforts, I wonder how many snow plows they would have paid for.