<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CONSOLIDATED
FINANCIAL STATEMENTS OF NORTH AMERICAN TECHNOLOGIES GROUP, INC FOR THE THREE AND
NINE MONTHS ENDED SEPTEMBER 30, 2000 AND 1999 (UNAUDITED) AND IS QUALIFIED IN
ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<S> <C> <C>
<PERIOD-TYPE> 3-MOS 3-MOS
<FISCAL-YEAR-END> DEC-31-2000 DEC-31-1999
<PERIOD-START> JUL-01-2000 JUL-01-1999
<PERIOD-END> SEP-30-2000 SEP-30-1999
<CASH> 429,775 198,709
<SECURITIES> 0 0
<RECEIVABLES> 20,268 18,432
<ALLOWANCES> 0 0
<INVENTORY> 212,541 36,248
<CURRENT-ASSETS> 688,222 331,616
<PP&E> 2,055,218 1,211,327
<DEPRECIATION> 208,494 182,630
<TOTAL-ASSETS> 5,814,022 5,210,543
<CURRENT-LIABILITIES> 1,224,408 1,099,097
<BONDS> 0 0
0 0
14,026,478 15,853,403
<COMMON> 6,393 3,663
<OTHER-SE> (9,546,268) (11,906,069)
<TOTAL-LIABILITY-AND-EQUITY> 5,814,022 5,210,543
<SALES> 20,870 5,740
<TOTAL-REVENUES> 20,870 5,740
<CGS> 103,679 27,339
<TOTAL-COSTS> 317,117 427,234
<OTHER-EXPENSES> (6,285) 383,358
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 26,826 113,541
<INCOME-PRETAX> 0 0
<INCOME-TAX> 0 0
<INCOME-CONTINUING> 0 0
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (408,364) (934,362)
<EPS-BASIC> (.07) (.26)
<EPS-DILUTED> (.07) (.26)
</TABLE>