The phrase "a source of grave" is not correct and does not convey a clear meaning in written English.
It may be intended to refer to something that causes serious concern or is a significant issue, but it lacks clarity and context.
Example: "The report highlighted a source of grave concern regarding the environmental impact of the project."
Alternatives: "a cause for serious concern" or "a matter of great importance."
The rapid rate at which wooded areas have been disappearing in Malawi is a source of grave concern.
"The incidents described in that report are a source of grave concern and reflect behavior that cannot be allowed to recur," Mr. Cohen said.
On his 85th birthday, he remarked that he had been "overestimated," though, he added, "I will not pretend that this has been a source of grave distress".
It is a city where waste has become an enormous public policy challenge, a source of grave diseases but also a valuable commodity.
A recent Conservative party report claimed that under President Xi "very serious threats to Hong Kong's freedoms have emerged as a source of grave concern".
The spread of Islamist control in southern Yemen has been a deep embarrassment to the Yemeni government and a source of grave concern to the United States and Saudi Arabia, the two chief targets of the local Qaeda affiliate.
It is these parallels that should be the source of grave concern for the future of a liberal world order, as it was the post-1873 crisis of liberalism that was the root cause for the darkest chapters of the history of the last century.
These have been the source of grave problems in computer security, such as the 2011 attack by the Chinese government on the Gmail accounts of suspected dissident activists was executed by exploiting lawful interception; so was the NSA's wiretapping of the Greek government during the 2004 Olympic bidding process.
The mass grave has long been a source of fascination for amateur archaeologists and Revolutionary War enthusiasts.
Pollution of this lake is of grave concern that it is a dwelling place for many birds and is a source of fodder for animals.
