Polar bears in Churchill in Manitoba, Canada have to be tranquillised then airlifted north in order to access their natural habitat as the snow is returning later and later after the summer months.

• 因夏日之后雪季逐渐地延后，所以在加拿大的曼尼托巴省契吉尔的北极熊必须被施打镇静剂，然后空运至北方，让牠们能够进入自然栖息地。