The phrase "a key question of" is correct and usable in written English.
It can be used when introducing an important or central issue that needs to be addressed or considered in a discussion or analysis.
Example: "In the context of climate change, a key question of sustainability is how to balance economic growth with environmental protection."
Alternatives: "a crucial issue of" or "an essential matter of".
Participatory planning became a key question of social equity," Ortiz explains.
These numbers raise a key question of huge importance if nations are to avoid the worst effects of climate change: Is the world on a path toward "decoupling" economic activity from carbon dioxide emissions?
Still unsettled, though, is a key question of how much the stagehands' union will share in revenues generated by products created through the use of the media room, like podcasts, DVDs and possible live broadcasts to theaters.
As a result, a key question of the Trump era is whether he might be in violation of the Emoluments Clause of the Constitution, which prohibits officials from receiving gifts from foreign states, when, for instance, foreign diplomats pay for rooms at Trump hotels.
A key question of interest is which site (or combination of sites) in the region influences susceptibility to the trait.
It also has potential to enhance access to these treatments in publicly funded health systems and more generally addresses a key question of how behavioural interventions can be made more accessible and practical for adults with primary headache [34] and provides support for conducting a definitive trial.
However, the determination of the near-miscible pressure interval is a key question for the screening of near-miscible flooding.
Interaction between mitigation and adaptation is a key question for the design of climate policies.
A key question for London is the source of the pollution.
But, as D'Monte points out, even for India, financing is a key question: one of the "non-negotiables" for India, Brazil, South Africa and China is speedier delivery of promised mitigation monies.
A key question is, of course, why specific sequences are targeted for hypermethylation in a biological milieu that is subject to global hypomethylation.
