Question: Does Düsseldorf have only a small number of smoggy days each year?
Answer: Mercer's 2012 Quality of Living survey ranked Düsseldorf the sixth most livable city in the world. Clean air is an important attribute for a livable city. Smog is a term for air pollution.. The answer is: yes.

Question: Is the span in C-SPAN named after Alan Greenspan?
Answer: Alan Greenspan was chairman of the Federal Reserve from 1987 to 2006. CSPAN is a cable news network that was created in 1979. Alan Greenspan was relatively unknown to the world at large in 1979.. The answer is: no.

Question: Does a Trek 9000 require an anchor in order to park?
Answer:
A Trek 9000 is a mountain bike. An anchor is used on water borne vehicles like boats.. The answer is: no.