Scotland's Rural College researchers said some communities faced problems around housing and fuel costs.
, carried out as part of wider work for the Scottish government, found increased costs of homes and fuel in some of these places.
Researchers also found it was £50 more expensive to fill a 60-litre diesel or unleaded tank in the some of these areas.Other findings included declining populations in parts of Lewis, Caithness, Sutherland and Dumfries and Galloway.Researchers also said there were vibrant communities with high levels of economic activity.
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