Opponents fear a spill would be a disaster, being difficult to clean up in icy seas.
Garrison Keillor was not quite right when he said that only Americans pulled down old houses because they were too difficult to clean.
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Banking messes are horribly difficult to clean up unless the bankers, businessmen and government officials responsible face penalties, especially where, as in Japan, they have committed crimes as well as made blunders.
Factor in concerns for the massive fishing industry and the environment, and the fact that the neighboring coast is populated and consists of stretches of marshland that will be difficult to clean (as opposed to the sparsely populated rocky coasts of Alaska) and the ramifications expand dramatically.
Environmental groups argued against the project, warning that a spill would be difficult to plug and clean up in the remote and inhospitable Arctic.
Monday's events show how difficult it will be to clean up local police forces.
Analysts expect that the failure of Solyndra could make it difficult for other clean energy ventures to tap into federal loans as a source of funds.
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Here is what gives nightmares to bank chief executives: there is not a clean distinction between a bank finding it difficult to borrow because of market "stress" and because it is bust.
"For kids who are susceptible to go back into that environment and to stay clean and sober, it's just got to be incredibly difficult, " said Lucy's mother, Abbie Lundberg.
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After years of failed efforts with regulation-centered energy policy, many more groups are shifting their intellectual capital toward the difficult work of structuring energy innovation policies to catalyze a clean energy revolution.
Hydrogen produced from renewable resources is a promising source of clean energy, but the gas is difficult to handle and transport.
We were also impressed with the incredibly clean bottom panel which, while incredibly difficult to photograph, does hide the required pile of stickers and licensed keys that usually pollute the laptop's exterior.
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Difficult conditions have led the utility company to evacuate around 730 of the 800 workers from the site, making clean up and safety operations even harder to perform.
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