One possible factor is that some disposals which could have been made in 2020-21 were displaced to 2021-22 due to coronavirus (COVID-19) restrictions impacting upon the waste sector.
Un ffactor posibl yw bod rhai gwarediadau y gellid bod wedi’u gwneud yn 2020-21 wedi’u symud i 2021-22 oherwydd y cyfyngiadau coronafeirws (COVID-19) oedd yn effeithio ar y sector gwastraff.