Sean Corcoran, 52, spent three hours making the sand art - based on an iconic portrait of the Swedish activist - before the tide came in and washed it away.<br /><br />He used two rakes and a horse-riding lunge stick to create the massive portrait which stretched 100ftx60ft across the beach at Copper Coast Geopark in Waterford, Ireland.<br /><br />Environmental artist Sean said: "My drawing is based on an iconic portrait of Greta by photographer, Michael Campanella.<br /><br />“I created a digital version of the picture first on my phone from a black and white photo of the portrait.
