Continue timing until no more carbon dioxide appears to be given off. Each time the presenters change the cylinder, they lose gas. So, they don’t obtain an accurate measurement. However ...

Chief technical officer Roddy Elder points told the BBC two sets of cylinders capture the carbon dioxide using a liquid solvent. The solvent then releases the gas to be cleaned and tested to ...

LAHORE: Zaki Aijaz, Regional Chairman of the Federation of Pakistan Chambers of Commerce and Industry (FPCCI), ...