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Dozens of people hospitalized by ammonia leak in Serbia
Ammonia leaks at chemical plant in Kochi's Willingdon Island, forces evacuation of residents, school students
Ammonia leak at International Space Station: Astronauts evacuate US section of station
Astronauts make hasty spacewalk to fix mystery ammonia leak at ISS
Christopher Cassidy and Thomas Marshburn installed a new pump after removing the old one suspected of spewing flakes of frozen ammonia coolant two days earlier
