Pollution: ‘Doc, should I go?’

FROM Kowloon Peninsula in Hong Kong, one looks out across an amazingly busy harbour. Boats large and small, modern and ancient plough back and forth. Container ships lumber slowly; ferries bustle purposely; and massive cruise ships — a delight for gastrointestinal and respiratory pathogens — set out optimistically. The odd junk chugs along between the larger ships; and in February, as I gazed out across the harbour, a three-masted sailing ship slid gracefully past. What a dynamic scene!