https://www.care4air.org/area/south-yorkshire/ 2013-04-10T10:29:55+00:00 monthly 0.6 https://www.care4air.org/area/sheffield/ 2026-04-21T10:44:30+00:00 monthly 0.6 https://www.care4air.org/area/doncaster/ 2013-06-28T10:26:42+00:00 monthly 0.6 https://www.care4air.org/area/rotherham/ 2015-10-02T08:56:23+00:00 monthly 0.6 https://www.care4air.org/area/barnsley/ 2013-04-04T10:06:16+00:00 monthly 0.6