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A New Orleans law firm is challenging government assurances that Gulf Coast seafood is safe to eat in the wake of the BP oil spill, saying it poses “a significant danger to public health.”

It’s a high-stakes tug-of-war that will almost certainly end up in the courts, with two armies of scientists arguing over technical findings that could have real-world impact for seafood consumers and producers.

Citing what the law firm calls a state-of-the-art laboratory analysis, toxicologists, chemists and marine biologists retained by the firm of environmental attorney Stuart Smith contend that the government seafood testing program, which has focused on ensuring the seafood was free of the cancer-causing components of crude oil, has overlooked other harmful elements. And they say that their own testing — examining fewer samples but more comprehensively — shows high levels of hydrocarbons from the BP spill that are associated with liver damage.

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These days, Casal Ventoso is an ordinary blue-collar community – mothers push baby strollers, men smoke outside cafes, buses chug up and down the cobbled main street.

Ten years ago, the Lisbon neighborhood was a hellhole, a "drug supermarket" where some 5,000 users lined up every day to buy heroin and sneaked into a hillside honeycomb of derelict housing to shoot up. In dark, stinking corners, addicts – some with maggots squirming under track marks – staggered between the occasional corpse, scavenging used, bloody needles.

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Now, the United States, which has waged a 40-year, $1 trillion war on drugs, is looking for answers in tiny Portugal, which is reaping the benefits of what once looked like a dangerous gamble. White House drug czar Gil Kerlikowske visited Portugal in September to learn about its drug reforms, and other countries – including Norway, Denmark, Australia and Peru – have taken interest, too.

“The disasters that were predicted by critics didn’t happen,” said University of Kent professor Alex Stevens, who has studied Portugal’s program. “The answer was simple: Provide treatment.”

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Drugs in Portugal are still illegal. But here’s what Portugal did: It changed the law so that users are sent to counseling and sometimes treatment instead of criminal courts and prison. The switch from drugs as a criminal issue to a public health one was aimed at preventing users from going underground.

Other European countries treat drugs as a public health problem, too, but Portugal stands out as the only one that has written that approach into law. The result: More people tried drugs, but fewer ended up addicted.