Business Green: One of the largest barriers to the development of renewable energy in the US could soon be removed, thanks to an ambitious new project to more effectively link areas rich in solar and wind energy resources to population centres across the country. Unveiled last week, the Tres Amigas project in New Mexico aims to build a grid “super station” that will link the US three main energy grids – the East, West and Texas interconnections – providing them with the ability to transmit renewable …