Mae Cyngor Bwrdeistref Sirol Caerffili wedi nodi mai tynnu 23 o anheddau i lawr yn Woodside Terrace, Hafod yr Ynys yw yr opsiwn mwyaf tebygol o leihau lefelau nitrogen deuocsid i lefel sy'n is na'r lefelau cyfreithiol cyn gynted â phosibl.
Caerphilly Council Borough Council has identified the demolition of 23 dwellings at Woodside Terrace, Hafodyrynys as the option most likely to reduce nitrogen dioxide levels to below legal limits in the soonest time possible.