(sheep bleating in distance) There is a growing threat to almost every grassland on Earth. (sheep bleating) Globally, the number of domesticated livestock has tripled over the last century, (sheep ...

Lexi Wolfe had been out hillwalking in Brockhill Park, Kent, on Saturday when she heard a chorus of distressed bleating from flock of sheep in a nearby field. Ms Wolfe, from Sheffield, Yorkshire, was ...