Business Green: Solar energy boom centred on the mediterranean reached another milestone this week as Spanish renewable energy company Renovalia Energy unveiled what it claims is the world’s first “second-generation” thermal solar plant. The company flicked the switch on its pioneering 1MW solar-thermal plant in Casas de los Pinos, Spain, earlier this week touting a series of improvements that promise to reduce the environmental impact of lareg scale solar farms. The plant uses external …