Petroleum has become an important part of some Indonesian people. The price hike and oil shortage of kerosene feels so hard for some Indonesian. If you happen to live in a cattle farm area, you can try to make biogas from animal’s excretion. The major components of biogas are animal’s excretion and other substances to make methane and carbon dioxide. By using biogas, you do not need to buy oil, LPG, or firewood.
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