Dog droppings are one of the leading causes of E' Coli pollution: each gram of dog poop has over 20,
https://www.powershow.com/view1/17b34e-ZDc1Z/Dog_droppings_are_one_of_the_leading_causes_of_E_Coli_pollution_each_gram_of_dog_poop_has_over_20_powerpoint_ppt_presentation
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