what is euro crisis

euro zone area consist single currency. To join in this euro zone every country must follow the common monetary policy. All euro zonal countries having common monetary policy and common intrest rates. All this set by europian central bank. Unfortunately Interest rate is not suitable for whole euro zone because all countries  in euro zone is  not equal. in euro zone  few states are growing much faster some are  as much slower. Unfortunately  in Germany inflation occurs. By inflation progressive increases in prices occur Due to inflation currency value decreses.due to currency value decres europian central bank increases the intrest rates . this higher rates are not suitable for other countries like Portugal grees and Italy.