The phrase 'urgent topic' is correct and usable in written English. It is typically used to refer to an issue that requires immediate attention. For example, "We need to discuss this urgent topic at the next meeting.".
These are valid opinions on an urgent topic, but one requiring scrutiny.
As 2018 dawns, come along to this evening class with historian of ideas Dr Hannah Dawson and get an intellectual grounding on the urgent topic of feminism.
For the new Serbian government, a more urgent topic will be talks to try to keep Serbia's tiny sister republic, Montenegro, in the Yugoslav federation.
Obrist had brought together an eye-catching roster of participants, but epic conversation was not well suited to addressing the urgent topic of extinction.
Here you experience again the urgent topics of that day: the evil that is the yuppie, the question of whether rap incites violence, the ethics of music sampling.
"There are two very urgent topics that needed to be addressed if the euro is going to be saved," he said.
The two men remained friends, often discussing such urgent topics as the development of Britain's national health service during Clement Attlee's government, but their particular passion was for trips abroad.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK