The ban on a veterinary drug which caused an unprecedented decline in Asian vulture populations has shown the first signs of progress, according to scientists. However, the recovery of the wild vulture populations requires efforts to see the drug completely removed from the birds' food supply. In a new study, published today in science journal, PLoS ONE, researchers report measurements of the prevalence and concentration of diclofenac in carcasses of domesticated cattle in India, made before and after the implementation of a ban on its veterinary use... 
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