Here is a question about this article: Unmarked vehicles are used primarily for sting operations or apprehending criminals without alerting them to their presence. Some police forces use unmarked or minimally marked cars for traffic law enforcement, since drivers slow down at the sight of marked police vehicles and unmarked vehicles make it easier for officers to catch speeders and traffic violators. This practice is controversial, with for example, New York State banning this practice in 1996 on the grounds that it endangered motorists who might be pulled over by people impersonating police officers.
What is the answer to this question: When do police often use unmarked cars?
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So... primarily for sting operations or apprehending criminals without alerting them to their presence

Here is a question about this article: TCM regularly airs a "Star of the Month" throughout the year on Wednesdays starting at 8:00 p.m. Eastern Time, in which most, if not all, feature films from a classic film star are shown during that night's schedule. Hosted by Robert Osbourne, the network also marks the occurrence of a film actor's birthday (either antemortem or posthumously) or recent death with day- or evening-long festivals showcasting several of that artist's best, earliest or least-known pictures; by effect, marathons scheduled in honor of an actor's passing (which are scheduled within a month after their death) pre-empt films originally scheduled to air on that date. TCM also features a monthly program block called the "TCM Guest Programmer", in which Osborne is joined by celebrity guests responsible for choosing that evening's films (examples of such programmers during 2012 include Jules Feiffer, Anthony Bourdain, Debra Winger, Ellen Barkin, Spike Lee, Regis Philbin and Jim Lehrer); an offshoot of this block featuring Turner Classic Movies employees aired during February 2011.
What is the answer to this question: On what day of the week are Star of the Month films aired?
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So... Wednesdays

Here is a question about this article: Some examples: the United Nations Framework Convention on Climate Change (UNFCCC) established a framework for the development of binding greenhouse gas emission limits, while the Kyoto Protocol contained the specific provisions and regulations later agreed upon.
What is the answer to this question: The Kyoto Protocol is associated with what treaty?
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So...
United Nations Framework Convention on Climate Change