Shenhai Kuputika-Uchapupu
Tembiricha dzakakwirira dzinounza hydrogen kusvika pakupisa kwayo, zvichitungamirira mukupisa kwayo: 2H2 + O2 + nzvimbo yekubatidza = 2H2O.
Magasi anopisa anoputika kana awana zvakadzika mumhepo kana oxygen, huwandu hunotsanangurwa semuganho unoputika. Zvehydrogen, muganhu uyu unotangira kubva 4% ku 74.2% maererano nehuwandu hwehuwandu.