CREATE TABLE table_27328 ("Region" TEXT, "Public network" TEXT, "Own/community generator" TEXT, "Solar panel" TEXT, "Other source" TEXT, "None" TEXT)

Which region has 0.6% none?
SELECT "Region" FROM table_27328 WHERE "None" = '0.6%'
SELECT "Region" FROM "table_27328" WHERE "None" = '0.6%'