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fodd bynnag , ni ddechreuodd y samplu ansawdd aer , y gofynnodd cyngor bwrdeistref sirol rhondda cynon taf iddo ddigwydd yr un pryd , tan 27 gorffennaf i 8 awst
however , air quality sampling , which rhondda cynon taff county borough council requested to take place concurrently , did not start until 27 july to 8 august
yn ogystal , mae'n ddigon posibl bod lefelau uchel o lygredd aer y tu allan yn chwarae rhan i achosi rhai mathau o asthma yn y lle cyntaf , gan fod ymchwil yn awgrymu bod lefelau uchel o osôn wedi cael eu cysylltu ag achosion newydd o asthma ymhlith pobl ifanc
in addition , high levels of outdoor air pollution may well play a part in causing some cases of asthma in the first place , as research indicates that high levels of ozone have been linked to new cases of asthma in young people
o ran pwynt cyntaf janet davies ynglyn â gollyngiadau pm10 , bydd yr atodiad i'r strategaeth ansawdd aer , y bwriedir ei gyhoeddi yn ddiweddarach yr wythnos hon , yn cynnwys amcanion llym ar gyfer bensin a charbon monocsid , ac amcanion dros dro ar gyfer pm10
on janet davies's first point about pm10 emissions , the air quality strategy addendum , due to be released later this week , will include tight objectives for benzene and carbon monoxide , and provisional objectives for pm10s
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