The town council in Havering, England, has turned to cows instead of lawnmowers to keep parks and other green spaces neat and trim. Locals say traditional grazing promotes biodiversity and could save half a million dollars over 10 years.The town council in Havering, England, has turned to cows instead of lawnmowers to keep parks and other green spaces neat and trim. Locals say traditional grazing promotes biodiversity and could save half a million dollars over 10 years.