Young urban shepherd Lukas Janssens guides his flock among the graves in Schoonselhof, one of Belgium’s iconic cemeteries, knowing sheep are kinder to nature than lawnmowers. Limiting emissions of carbon dioxide, a key contributor to climate change, and promoting biodiversity are two key goals of De Antwerpse Stadsherder — The Antwerp City Shepherd, Janssens' company of one human and 270 sheep.