Exhibit 23(a)

CONSENT OF INDEPENDENT REGISTERED

PUBLIC ACCOUNTING FIRM

We hereby consent to the use in this Registration Statement on Form S-1 of our report dated March 20, 2018 with respect to the consolidated balance sheets of Medizone International, Inc., subsidiary and affiliate (collectively, the Company) as of December 31, 2017 and 2016, and the related consolidated statements of comprehensive loss, stockholders’ deficit, and cash flows for each of the years in the two-year period ended December 31, 2017, and to the reference to our firm under the heading “Experts” in such Registration Statement.

/s/ TANNER LLC

Salt Lake City, Utah

April 3, 2018