The phrase "availability is a major" is not complete but can be considered correct in written English if it is part of a larger sentence.
You can use it when discussing the importance of availability in a specific context, such as business, services, or resources.
Example: "In our industry, availability is a major factor that influences customer satisfaction and retention."
Alternatives: "availability is a key" or "availability is a significant".
Water availability is a major issue because of climate change (widespread floods and droughts), the global expansion of the western diet (the shift in China, for example, to eating more meat and dairy), a rising world population and our insatiable demand for bio-fuels.
Low phosphorus availability is a major factor limiting rice productivity.
They are attracted by reduced emission levels, but limited fuel availability is a major concern.
Water availability is a major environmental driver affecting riparian and wetland vegetation.
System availability is a major performance concern in distributed systems design and analysis.
The relationship between architecture, network reliability, and network availability is a major topic in itself.
Soil P availability was a major limiting factor of the rhizobial symbiosis.
While the flow analysis may be of immediate help, due to the wide bedside availability, there is a major role for sFlt-1 and PlGF in supporting the differential diagnosis.
What we do know, however, is that homelessness is on the rise and that the cost and availability of housing is a major factor behind this increase.
Whether in or outside children's immediate home environment, the availability of books is a major prerequisite to becoming an avid reader, making public and school libraries important places, particularly for children from disadvantaged homes (Anderson et al. 1985).
This hypothesis is based on the observation that changes in food availability among seasons is a major cause of migration [20], [21], [22] and that larger brains (relative to body size) are associated with increased behavioral flexibility to explore and utilize new or changing food resources more successfully [5], [6], [9], [10], [11], [23].
