<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 SIX MONTHS ENDED JUNE 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> APR-01-2000 APR-01-1999
<PERIOD-END> JUN-30-2000 JUN-30-1999
<CASH> 574,693 429,473
<SECURITIES> 0 0
<RECEIVABLES> 3,263 7,707
<ALLOWANCES> 0 0
<INVENTORY> 80,784 65,256
<CURRENT-ASSETS> 724,125 729,614
<PP&E> 1,908,450 1,203,177
<DEPRECIATION> 191,284 178,285
<TOTAL-ASSETS> 5,753,116 5,942,186
<CURRENT-LIABILITIES> 1,461,614 1,189,071
<BONDS> 0 0
0 0
13,635,712 15,878,417
<COMMON> 5,993 3,619
<OTHER-SE> (9,450,057) (11,326,746)
<TOTAL-LIABILITY-AND-EQUITY> 5,753,116 5,942,186
<SALES> 1,625 44,466
<TOTAL-REVENUES> 1,625 44,466
<CGS> 1,539 69,524
<TOTAL-COSTS> 785,523 545,373
<OTHER-EXPENSES> (15,608) (6,430)
<LOSS-PROVISION> 0 0
<INTEREST-EXPENSE> 21,860 20,379
<INCOME-PRETAX> 0 0
<INCOME-TAX> 0 0
<INCOME-CONTINUING> (790,150) (517,856)
<DISCONTINUED> 0 0
<EXTRAORDINARY> 0 0
<CHANGES> 0 0
<NET-INCOME> (790,150) (517,856)
<EPS-BASIC> 0 0
<EPS-DILUTED> 0 0
</TABLE>