Extreme weather brought about by the El Nino phenomenon could cost Hong Kong as much as US$300 billion over the 21st century, according to a joint study by local and Singapore universities. The study also painted a bleak picture for public health, finding that Hongkongers born during the two strong El Nino events in 1982-83 and 1997-98 could have their life expectancy reduced by five to seven months. Led by Singapore’s Nanyang Technological University in collaboration with City University...