Many of the outcomes and impacts at TAD sites will only be fully revealed over a longer period of time, arguably 2 to 5 years after projects are operational.
Dim ond dros gyfnod hwy y bydd llawer o'r canlyniadau a'r effeithiau ar safleoedd TAD yn dod i’r amlwg, o bosibl 2 i 5 mlynedd ar ôl i brosiectau gael eu cwblhau.