English: yellow space
Welsh: man melyn 
Subject: Amgylchedd
Welsh definition: Green infrastructure incorporates green, blue and yellow space: green space means parks, natural spaces, river banks, village greens etc; blue space means ponds, rivers, lakes, streams, wetlands etc; and yellow space means beaches.
Welsh context: Dylid gwella lefelau llesiant meddyliol drwy annog rhyngweithio cymdeithasol a chynyddu mynediad at fannau gwyrdd, melyn neu las.
Plural: mannau melyn