SCOTLaND must embrace renewables as there is no alternative to new forms of energy generation, given the world's dwindling reserves of oil, coal and uranium, a senior industry figure has argued.  Rick Eggleston, the managing director of wind turbine manufacturer REpower UK, threw his weight into a debate that has been raging since First Minister alex Salmond vowed to see renewables produce 100 per cent of Scotland's electricity by 2020.  Last week industry experts lambasted the SNP's policy as being "impossible" and a threat to the Scottish landscape but others, including Ignacio Gal??n, the head of Spanish power firm Iberdrola, which owns ScottishPower, said the ambition was "entirely credible".  Eggleston, whose firm is working with Scottish and Southern Energy to develop a 35-turbine wind farm at Gordonbush in Sutherland, agreed that renewables are currently among a cluster of "expensive" ways to produce energy, which has an impact on the price charged to customers.  He said: "Cost is a big area