An extraordinary effort is needed to combat the energy crisis, Premier Giorgia Meloni told EU leaders Monday.     There is "the need for an extraordinary effort, both at the national and European level, to counter the short- and medium-term effects of the energy crisis," Meloni reiterated during the third meeting, held via videoconference, of the informal working group on European competitiveness, which was attended by several EU leaders and Commission President Ursula von der Leyen.     Meloni,