And landowners should seek assurance that drinking water will be tested pre- and post-drilling, with any adverse effects remediated.

FORBES: Shale Leases: Promised Land

Officials, including Mr Gabrielli, argue that since drilling in the pre-salt is now almost certain to yield oil, the rewards for investors in new blocks should reflect this lower exploration risk.

ECONOMIST: Brazil

Even if the costs from drilling are much greater than was recognized pre-spill, that does not make Cap-and-Trade a good policy.

FORBES: A Gulf Spill Reality Check