Business Green: Construction will begin tomorrow on Australia’s largest concentrated solar-thermal tower system near Newcastle in New South Wales. The Commonwealth Scientific and Industrial Research Organisation (CSIRO) will begin installing 450 large mirrors, called heliostats, which will eventually reflect the sun on to a 30-metre-high solar tower, generating temperatures of up to 1,000°C. Compressed air passed through the tower will then expand on being heated and power a 200kW …