Much of Europe, particularly Germany, has poor wind availability and is generally cloudy. They've installed enough turbines to be nearly self-sufficient if you add the nameplate-max-generation of all of those turbines together BUT in actuality it's more like 20%. They have a local energy source, might be energy self-sufficient, but it's COAL which both produces more CO2 per BTU than nat gas and puts a lot of other 'junk' in the air (notably sulfur dioxide which can turn into sulfuric acid, come down as acid rain - so a large downwind area of plants/trees less able to take up/store CO2). But at least they'd "be self sufficient with a local source". Joy.