1 / 4   A Berlin zoo has creatively transformed leftover Christmas trees into animals’ snacks and toys, effectively reducing the waste of leftover products from the festival. /VCG Photo

2 / 4   The annual treats were offered to animals at Tierpark, one of the two zoos in Berlin, Germany on Friday. /VCG Photo

3 / 4   To meet different animals’ needs, the zoo put on well-prepared decorations on Christmas trees. Monkeys were offered trees with vegetables decorations and tigers got those with meat decorations, while elephants directly eat the trees. /VCG Photo

4 / 4   To ensure safety and quality, the zoo only adopted fresh and unused trees from selected vendors rather than accepting public Christmas trees as they might contain chemicals and other leftover decorations. /VCG Photo