TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preparation (Disclosed): The microorganism is prepared by standard recombinant methods. Preferred Microorganism: The engineered microorganism is modified to express an attenuated level of an acyl-coenzyme A (CoA) synthase (EC 2.3.1.86). The microorganism further comprises a polynucleotide sequence encoding a hydrocarbon biosynthetic polypeptide which exhibits at least 90% sequence homology to amino acid sequence of SEQ ID NO: 166-200 (even SEQ ID numbers). Preferred Polypeptide: The fatty aldehyde biosynthetic polypeptide exhibits at least 90% sequence homology to amino acid sequence of SEQ ID NO: 41-127 (odd SEQ ID numbers). The fatty aldehyde biosynthetic polypeptide comprises an amino acid sequence motif in a sequence of (i) SEQ ID NO: 129-132, (ii) SEQ ID NO: 133-136, or (iii) SEQ ID NO: 129-133. The fatty aldehyde biosynthetic polypeptide is encoded by a polynucleotide exhibiting at least 90% sequence homology to nucleotide sequence of SEQ ID NO: 42-128 (even SEQ ID numbers). The acyl-ACP reductase polypeptide comprises an amino acid sequence exhibiting at least 90% sequence homology to amino acid sequence of SEQ ID NO: 137-153 (odd SEQ ID numbers). The acyl-ACP reductase polypeptide comprises an amino acid motif in a sequence of SEQ ID NO: 155-165. The acyl-ACP reductase polypeptide is encoded by a polynucleotide exhibiting at least 90% sequence homology to nucleotide sequence of SEQ ID NO: 138-154 (even SEQ ID numbers). The fatty alcohol biosynthetic polypeptide is a fatty aldehyde reductase or alcohol dehydrogenase (EC1.1.1.1). The fatty alcohol biosynthetic polypeptide exhibits at least 90% sequence homology to a polypeptide sequence chosen from SEQ ID NO: 1-39 (odd SEQ ID numbers). The fatty alcohol biosynthetic polypeptide is encoded by a polynucleotide exhibiting at least 90% sequence homology to nucleotide sequence of SEQ ID NO: 2-40 (even SEQ ID numbers). The fatty alcohol biosynthetic polypeptide is a fatty aldehyde reductase or alcohol dehydrogenase (EC1.1.1.1), and the gene encoding the polypeptide is knocked-out. The hydrocarbon biosynthetic polypeptide comprises one or more amino acid substitutions, additions, deletions or insertions in the amino acid sequence of SEQ ID NO: 166-200 (even SEQ ID numbers). The hydrocarbon biosynthetic polypeptide comprises amino acid sequence having amino acid motif sequence of (i) SEQ ID NO: 202, (ii) SEQ ID NO: 203-205, (iii) SEQ ID NO: 203-206, or (iv) SEQ ID NO: 207-210, where the hydrocarbon biosynthetic polypeptide has decarboxylase activity. Preferred Method: The fatty alcohol is spontaneously secreted from the microorganism, and actively transported into the extracellular environment, or passively transported into the extracellular environment. The method (M1) further involves isolating fatty alcohol from the culture. The fatty acid has a hydroxyl group in primary (1C) position. The fatty alcohol is unsaturated at omega -7 position. The unsaturated fatty alcohol has a cis double bond. The method (M2) further involves culturing the microorganism in the presence of a saturated fatty acid derivative or unsaturated fatty acid derivative. The saturated fatty acid derivative is 14-22C saturated fatty acid derivative. The unsaturated fatty acid derivative is 14-22C unsaturated fatty acid derivative chosen from octadecenal, hexadecenal, methylhexadecenal and methyloctadecenal. The hydrocarbon has delta -carbon-13 (13C) of -15.4 or more, and fm14C of at least 1.003. EXAMPLE - M-1 AlrA gene was isolated from Acinetobacter baylyi, and the obtained gene was amplified. The amplified gene was cloned into a plasmid pETDuet-1-'tesA-alrAadp1. The plasmid was introduced into Escherichia coli C41 and the E.coli transformants were cultured in 3 ml of lysogeny broth (LB) supplemented with carbenicillin (100 mg/l) and chloramphenicol (34 mg/l) at 37 degrees C for 20 hours. The expression of AlrA gene resulted in fatty alcohol titers of 700 mg/l or more was screened using carA or carB.