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VOICED: Scientists are flying weather balloons into the upper atmosphere to build a more precise picture of the carbon dioxide 'blanket' that causes global warming. Sky News filmed one of the first balloon flights carrying a CO2 monitor and GPS tracker. Our Science Correspondent Thomas Moore reports. SHOWS: Exterior ground and drone aerial shots of Weather balloon being inflated; Interview with Dr Keri Nicoll, Atmospheric Scientist / Graphic following rise of weather baloon; interior shots of scientists looking at graphs on laptop; Interview with Dr Paul Smith, Atmospheric Scientist file footage of Sky News weather balloon going up in space; Interview with Professor Bill Collins, Climate Scientist. Shot on December 11, 2015 in Reading, England.