Bydd angen dangos ystod o feini prawf amgylcheddol, fel defnyddio deunyddiau wedi eu hailgylchu neu ddeunyddiau naturiol, a darparu lefelau uchel o olau dydd naturiol, ynni isel a defnydd dŵr, a gwneud cyfraniad cadarnhaol tuag at fioamrywiaeth.
There will be a need to demonstrate a range of environmental criteria, such as using recycled or natural materials, providing high levels of natural daylight, low energy and water consumption, and to make a positive contribution towards biodiversity.