CREATE TABLE table_22012 ("Name" CLOB, "Volume" CLOB, "Engine" CLOB, "Fuel" CLOB, "Output" CLOB, "Torque" CLOB, "Engine ID code ( s ) " CLOB, "0\\u2013100km/h , s" CLOB, "Top speed" CLOB, "CO 2" CLOB, "Years" CLOB)

Name the volume for co 2 for 168 g/km
SELECT "Volume" FROM table_22012 WHERE "CO 2" = '168 g/km'
SELECT "Volume" FROM "table_22012" WHERE "CO 2" = '168 g/km'