Many oil rigs off the coast of California are being decommissioned, and the question is whether the oil companies must remove the rigs entirely, or leave a large portion of them, converting the rigs in to artificial reefs. Marine life has been thriving on the old rigs, and the Gulf Coast has converted more than 400 old rigs into reefs since 1985.  But California has been blocked from converting the rigs by environmentalists. Click here to read the NY Times article.