energy demand / oil and gas industry / energy resources / household chemicals / household products / important well stimulation technology / energy needs / oil and gas shale reservoirs / shale gas / metal oxides / energy security / meet growing global energy demand / oil and gas exploration / natural gas / oil and gas / appropriate systems / energy supplies / cement / appropriate management systems / oil and gas imports / oil / steel casing / practice management systems / energy output / energy efficiency improvements / chemicals / renewable energy resources / clean energy / food / medical and dental equipment / energy / designing appropriate systems / /