== Energilagring ==
I fremtiden kan det tænkes, at man kan gemme [[energi]]en i [[brint|hydrogen]] som er besværligt at gemme – eller ethanol der er forholdsvist ugiftigt, miljøvenligt og let at opbevare.
<ref>[https://web.archive.org/web/20070301100142/http://www.popularmechanics.com/science/earth/2690341.html Popular Mechanics – Crunching The Numbers On Alternative Fuels] Citat: "...according to the DOE, the growing, fermenting and distillation chain actually results in a [[overskud|surplus]] of energy that ranges from 34 to 66 percent..."</ref>
<ref>{{Cite web |url=http://www.physicsweb.org/article/news/8/2/6 |title=Physicsweb: Fuel cells turn to alcohol |access-date= 6. august 2004 |archive-date= 8. august 2004 |archive-url=https://web.archive.org/web/20040808113617/http://physicsweb.org/article/news/8/2/6 |url-status=dead }}</ref>
<ref>{{Cite web |url=http://www.ilsr.org/columns/2004/021504.html |title=Cruising the Ethanol Highway |access-date= 6. august 2004 |archive-date=24. august 2004 |archive-url=https://web.archive.org/web/20040824083012/http://www.ilsr.org/columns/2004/021504.html |url-status=dead }}</ref>
Psykologi Samfund Sygdomme Kemi Sundhed Teknologi Arkitektur Sikkerhed Jordbrug