Tribeca Fights Dog Pee

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"The ammonia and urea in urine can eat right through the bark of a tree, gradually causing damage that makes the tree more susceptible to disease. And each time a dog marks a tree, it invites another visit. 'If it’s one cocker spaniel, it leaves a few teaspoons,' said Hall. 'But then the next visitor could be a Great Dane or a Newfoundland! And if that happens, say, 50 times a day it does a lot of damage.'" [Tribeca Trib]

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