Masses of seaweed is cleared away along the French coastline at Saint Michel-en-Greve, Northern Brittany, August 2, 2011. The mysterious death of 36 wild boars on France's northwestern coast baffled ... more 
Masses of seaweed is cleared away along the French coastline at Saint Michel-en-Greve, Northern Brittany, August 2, 2011. The mysterious death of 36 wild boars on France's northwestern coast baffled authorities on Tuesday after tests suggested large amounts of rotting seaweed strewn across beaches may not be to blame. Environmentalists had said that toxic, foul-smelling hydrogen sulfide gas emitted by the rotting seaweed had poisoned the animals in the Cotes d'Armor region of Brittany. Ecologists say that nitrates pollution in rivers from fertilizers used in intensive farming has boosted the growth of algae along France's coastline. less 
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| Photo By REUTERS/Benoit Tessier
Sat, Jun 9, 2012 6:00 PM EDT