Lichen covered rocks indicate the unpolluted air on St Kilda. . Hirta, St Kilda, Scotland, UK.

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Lichen covered rocks indicate the unpolluted air on St Kilda. . Hirta, St Kilda, Scotland, UK. 06Jul15

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Size: 4223px × 2685px
Location: Hirta, St Kilda, Scotland, UK.
Photo credit: © MichaelGrant / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: air, atlantic, barndigital, clean, clear, hebrides, heritage, hirta, isles, kilda, lichen, ocean, outer, scotland, site, st, unpolluted, western, world