请以发表文章的要求优化这句话：The conventional approach of relying on widespread irrigation to meet the growing water demand for wheat has become unsustainable due to the escalating water scarcity challenges faced b

As a requirement for publication, it is necessary to optimize the following sentence: "The conventional method of relying on extensive irrigation to satisfy the increasing water demand for wheat has become unviable, given the mounting water scarcity issues confronting numerous regions where wheat is cultivated."

The revised sentence is clearer and more concise, with improved phrasing and vocabulary.