ROBERT BROOK / SCIENCE PHOTO LIBRARY ROBERT BROOK / SCIENCE PHOTO LIBRARY
Bin for dog waste. The bin enables people who are walking their dog to dispose of dog faeces. One risk with decomposing dog faeces is that they can, if the dog is infected, contain eggs from Toxocara canis, a roundworm. The risk is small, but if the eggs are ingested by humans, blindness can result. Photographed in Avon, England.
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