Offshore oil wells are great [ habitats for fish ]( http://arstechnica.com/science/2014/10/californias-most-productive-fisheries-the-offshore-oil-rigs/ ) . Burning oil generates CO2 which [ makes some fish dangerously uncautious ]( https://stallman.org/archives/2014-mar-jun.html#14_April_2014_(Emboldened_by_chemistry) ) and [ will kill (at a sufficient concentration) many shelled animals ]( https://stallman.org/archives/2011-mar-jun.html#30_May_2011_(Acidification) ) . But we could plant suitable structures without using them to extract oil.
Ссылка: https://stallman.org/archives/2014-jul-oct.html#19_October_2014_%28Fish_in_offshore_oil_wells%29