The phrase "a primary contributor" is correct and usable in written English.
It can be used to refer to someone or something that plays a major role in contributing to a particular outcome or result.
Example: "In the success of the project, she was a primary contributor, providing valuable insights and expertise."
Alternatives: "a key contributor" or "a major contributor".
The E.P.A. administrator, Scott Pruitt, has said carbon dioxide is not a primary contributor to warming.
Diabetes is increasingly prevalent and a primary contributor to the major causes of disability and death.
He went on, "I would not agree that it's a primary contributor to the global warming that we see.
Speed is a primary contributor to crash frequencies and increased severity with over 30% of traffic fatalities attributed to speed.
"Over the last four years it has been brilliant working with Paula, who has been a primary contributor to the strategy and decision-making.
But, they said, the presence of Mr. Pruitt, who says he does not believe carbon dioxide is a primary contributor to global warming, would be particularly provocative.
And in Seattle, some local lawmakers have blamed Amazon for being a primary contributor to the region's lack of affordable housing and other woes.
The agency's administrator, Scott Pruitt, has said he does not believe that carbon dioxide is a primary contributor to global warming.
The building sector consumes a high percentage of total energy worldwide and in turn, a primary contributor to the global environmental degradation.
Because of the lack of effective protection for bicyclists, vehicle-bicycle (V-B) accident has become a primary contributor to traffic fatalities.
WASHINGTON — Scott Pruitt, the head of the Environmental Protection Agency, said on Thursday that carbon dioxide was not a primary contributor to global warming, a statement at odds with the established scientific consensus on climate change.
