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<text fn="Arial" fh="15" fc="16777215" fa="1" charset="238">On a commercial scale hydrogen is produced from methane </text>
<text fn="Arial" fh="15" fc="16777215" fa="1" charset="0">(main component of earth gas)</text>
<text fn="Arial" fh="15" fc="16777215" fa="1" charset="238"> in the reaction with water and by reaction of steam on coal. In the laboratory hydrogen is obtained in the reaction of acids with metals</text>
<text fn="Arial" fh="15" fc="16777215" fa="1" charset="0">, for example zinc, and by electrolysis of water</text>