As recent research has shown, the issues are complex and there is no single solution (Second homes: developing new policies in Wales report by Dr Simon Brooks).
Fel y dengys gwaith ymchwil diweddar, mae'r materion yn gymhleth ac nid oes un ateb i bopeth (Ail gartrefi: datblygu polisïau newydd yng Nghymru adroddiad gan Dr Simon Brooks).