The phrase "are a large component" is correct and usable in written English.
It can be used when discussing the significance or role of a particular element within a larger context or system.
Example: "In our analysis, renewable energy sources are a large component of the overall strategy for reducing carbon emissions."
Alternatives: "constitute a significant part" or "form a major element".
It's altogether much more difficult to protect other species of sharks and rays because they are a large component of fisheries.
Forests are a large component of the global carbon (C) stocks, containing an estimated 1146 Pg C (Dixon et al. 1994).
Well-designed validation or verification studies and appropriate data analysis approaches are a large component of new test implementation and will be discussed in this article.
Blacks born in Puerto Rico are a large component of Hispanic black Americans, who have a lower wage penalty than non-Hispanic black Americans and therefore represent an important additional comparative group for assessing the extent of assimilation of black immigrants.
Such membrane proteins are a large component of the genome and include many proteins of great physiological importance, such as ion channels and receptors.
Growing evidence clearly shows that impairments in HRQOL are a large component of the disease burden imposed by psoriasis.
Indigenous peoples suffered the most, and redressing these grievances was a large component of the 1996 peace accords.
Corporation tax reductions will have a negligible effect on the 65% of children's homes providers who have one or two homes and where staffing is a large component.
In the latest quarter the company did not break out revenue for the unit, but did say that revenue at an operating division, of which Fox Interactive Media is a large component, decreased by $254 million, or 35percentt.
When oil prices rise, so do the prices of other commodities, a signal of brisk demand for what is a large component of train freight.
