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                                                                    EXHIBIT 99.1


             CERTIFICATION PURSUANT TO RULE 13a-14 PROMULGATED UNDER
                   SECURITIES EXCHANGE ACT OF 1934 AS AMENDED


I, David A Segal, Chief Executive Officer and Chief Financial Officer, certify
that:

   1.    I have reviewed this annual report on Form 10-K of EXX INC;

   2.    Based on my knowledge, this annual report does not contain any untrue
         statement of a material fact or omit to state a material fact necessary
         to make the statements, in light of the circumstances under which such
         statements were made, not misleading with respect to the period covered
         by this annual report.

   3.    Based on my knowledge, the financial statements, and other financial
         information included in this annual report, fairly present in all
         material respects the financial condition, results of operations and
         cash flows of the registrant as of, and for, the periods presented in
         this annual report.

   4.    I am responsible for establishing and maintaining disclosure controls
         and procedures (as defined in Exchange Act Rules 13a-14 and 15d-14) for
         the registrant and have:

               a) designed such disclosure controls and procedures to ensure
that material information relating to the registrant, including its consolidated
subsidiaries, is made known to us by others within those entities, particularly
during the period in which this annual report is being prepared;

               b) evaluated the effectiveness of the registrant's disclosure
controls and procedures as of a date within 90 days prior to the filing date of
this annual report (the "Evaluation Date"); and

               c) presented in this annual report my conclusions about the
effectiveness of the disclosure controls and procedures based on my evaluation
as of the Evaluation Date:

   5.    I have disclosed, based on our most recent evaluation, to the
         registrant's auditors and the audit committee of registrant's board of
         directors (or persons performing the equivalent functions):

               a) all significant deficiencies in the design or operation of
internal controls which could adversely affect the registrant's ability to
record, process, summarize and report financial data and have identified for the
registrant's auditors any material weaknesses in internal controls; and

               b) any fraud, whether or not material, that involves management
or other employees who have a significant role in the registrant's internal
controls; and

   6.    I, as Chief Executive Officer and Chief Financial Officer, have
         indicated in this annual report whether there were significant changes
         in internal controls or in other factors that could significantly
         affect internal controls subsequent to the date of our most recent
         evaluation, including any corrective actions with regard to significant
         deficiencies and material weaknesses.


Date March 28, 2003                                   /s/ David A. Segal
                                                      --------------------------
                                                      David A. Segal
                                                      Chief Executive Officer
                                                      Chief Financial Officer