Cheaper oil prices bodes well for heavy oil importing nations like the U.S. and Europe, but also for important emerging market nations like India and China.

FORBES: Oil Prices Seen Lower As US Recession Odds Increase

Airships might, however, come into their own carrying large (as well as heavy) things such as generators, turbines or components of oil refineries.

ECONOMIST: Pushing the envelope

These provide access to the central bore of the well underneath most of the heavy valves which should have closed off the flow of oil, but for some reason did not.

ECONOMIST: The Gulf oil spill