It is correct and usable in written English.
You can use it when you are describing the result or consequence of something. Example sentence: One key consequence of global warming is an increase in extreme weather events.
Here again, the ability to eradicate insomnia is mentioned as a key consequence of winning.
The serial shootings of unarmed black men by law enforcement; the Justice Department report on police abuse and corruption in Ferguson, Missouri; the gutting of a Voting Rights Act provision that was one key consequence of the Selma marches these and other dispiriting headlines have perhaps rendered the confident optimism of Cooke's masterpiece difficult to sing along to without seeming naïve.
The serial shootings of unarmed black men by law enforcement; the Justice Department report on police abuse and corruption in Ferguson, Missouri; the gutting of a Voting Rights Act provision that was one key consequence of the Selma marches — these and other dispiriting headlines have perhaps rendered the confident optimism of Cooke's masterpiece difficult to sing along to without seeming naïve.
The local flow temperature is a key consequence of combustion and must, therefore, be accurately measured.
Spending more time on proper design and on careful details is seen as the key consequence of this analysis.
One key consequence is that estimates of f(X) can depend systematically on which values of the predictors happen to be in the realized data.
Wollaston anticipates three key consequences.
The post-election bargaining will be tricky.Two key consequences may follow.
The post-election bargaining will be a lot trickier than Mr Netanyahu expected.Two key consequences may ensue.
More than 50 years ago, one of the key consequences of the ending of the Cuban missile crisis was an implicit concession on the part of President Kennedy that Washington would have to co-exist with the Cuban revolution.
Elevated CO2 and drought are key consequences of climate change and affect soil processes and plant growth.
