Keeping cool with colours - Vienna museum paints asphalt to fight heat
/> Equipped with an infrared thermometer, Austrian artist Jonas Griessler measures the sweltering heat in an inner courtyard in the centre of Vienna. Thanks to his collective's art work covering the black asphalt with a multitude of bright colours, the ground temperature has dropped from 31C to 20C. Initiated by the museum showing the private collection of late Austrian billionaire Heid