The phrase "as key problems" is correct and usable in written English.
It can be used when discussing significant issues or challenges within a particular context or subject matter.
Example: "The report identifies several areas of concern, highlighting them as key problems that need immediate attention."
Alternatives: "as major issues" or "as critical challenges".
Mr. Greco also identified traffic congestion and overcrowded schools in Elmhurst and Corona as key problems.
He pointed to the turnovers and defensive effort as key problems.
They pinpointed a lack of scanners and key personnel such as radiologists and endoscopists to meet demand as key problems.
A lack of equipment, staff and training were identified as key problems by the online poll of nearly 600 nurses.
Indeed, Popular Science recently closed comments on its main website, citing anti-science trolls and spambots as key problems, and referring to research that shows "even a fractious minority wields enough power to skew a reader's perception of a story".
Officers and clinicians identified incarceration and lack of treatment of mental health service users as key problems, and they jointly drafted a curriculum based upon the Crisis Intervention Team (CIT) model adapted for Liberia.
[AP]....And 'government' mentioned as often as 'economy' and 'jobs' as key problem - Justin McCarthy reports on the latest reading from Gallup: Americans continue to name the government (18%) as the most important U.S. problem, a distinction it has had for the past four months.
Too often small and well-worn technical toolkits serve the purpose of declaring certain key problems as Unanswerable and thus as Ignorable.
To integrate the four components as a whole system, some key problems, such as the dense mesh registration, the model matching procedure, the mesh segment, and fusion (the small rectangles shown in Figure1) should be solved.
The use of the synthetic drug spice has been identified as one of the key problems in Britain's prisons.
Difficulty in publishing results from integrative research is referred to as one of the key problems for operationalization.
