Moscow, May 22 -- A delegation of the Vietnamese National Assembly (NA) led by Vice Chairman Le Minh Hoan is attending the 11th Nevsky International Ecological Congress (NIEC) in St. Petersburg, at the invitation of Speaker of the Federation Council of the Federal Assembly of the Russian Federation Valentina Matvienko. The congress, being held on May 22-23 under the theme "Planet Earth: Living in Harmony with Nature," features the participation of representatives from 76 nations and 17 international orgnanisations. In his opening remarks, First Deputy Speaker of the Federation Council Andrey Yatskin said that the NIEC's main purpose is to promote the formation of effective mechanisms for sustainable development to preserve the environment...