after around 2002, most local and regional domestic energy efficiency activities were handed over to the united sustainable energy agency (formerly milton keynes energy agency – mkea), but nef retained involvement in projects such as milton keynes' low carbon living (formerly thimkagain!) campaign, and in 2013 agreed to merge with usea. the foundation undertakes work with local communities across the uk in partnership with the sustainable energy academy, most notably through the superhomes project (originally known as old home superhome), and through its involvement with the local united and communities & climate action alliance projects.