Public bodies need to make sure that when making their decisions they take into account the impact they could have on people living their lives in Wales in the future.
Mae angen i gyrff cyhoeddus sicrhau, wrth wneud eu penderfyniadau, eu bod yn ystyried yr effaith y gallent ei chael ar bobl sy'n byw eu bywydau yng Nghymru yn y dyfodol.