The construction of an intersystem electric transmission network "Maritza Iztok - Nea Sanda" was discussed during the meeting of the Economy Minister and the Greek Minister of development Hristos Folias.The project can start by the end of 2008 and end by 2011.The two ministers signed a declaration on intentions, which calls for an intensification of the cooperation in the field of power engineering.These agreements increase our mutual energy security and the general development of new and clear sources of energy, the Greek Minister of Development Hristos Folias said.Greek investment in Bulgaria has increased two times in the first six months of 2008. This was announced during the meeting.The Economy Minister Petar Dimitrov informed his Greek colleague that the electric transmission network "Chervena mogila - Shtip" will be officially opened on December 15 2008.