Hong Kong should adopt a top-down, comprehensive ecotourism policy to safeguard the city’s natural attractions, with a designated authority taking the lead, experts have urged, after a surge in Labour Day “Golden Week” visitors overwhelmed ecologically sensitive spots. The call on Monday came after a viral video showed a Mandarin-speaking tourist smoking a cigarette in front of the press and claiming he had confirmed with law enforcement officers that smoking was allowed at the beach of Ham Tin.