Monday United Nations High Commission for Refugees holds an international expert round-table discussion on «Rescue at Sea and Maritime Interception in the Mediterranean,» at Holiday Inn Hotel in Athens. To tomorrow. Tel. 210.672.6462. International workshop on «Geo-Environment and Geotechnics» takes place at the George Eliopoulos Conference Center on the island of Milos. To Wednesday. Tel. 210.973.0697 or log on to www.milos.conferences.gr. British-Hellenic Chamber of Commerce hosts seventh annual «Back-to-Business BBQ 2005» in British Embassy residence garden. Tel. 210.721.0361 or log on to www.bhcc.gr. Tuesday Ecumenical Patriarch Vartholomaios conducts a seven-day trip to northern Greece. Left-Coalition Synaspismos President Alekos Alavanos visits the Thessaloniki International Fair. To Wednesday. Bus drivers stage a work stoppage from the beginning of their shift until 8 a.m. and from 9 p.m. until the end of their shift, demanding a collective labor agreement. Wednesday Prime Minister Costas Karamanlis visits New York to attend United Nations General Assembly. To Friday. Communist Party President Aleka Papariga visits the Thessaloniki International Trade Fair. To Wednesday. The first international «Super Sports Show» on sports equipment, nutrition and health opens at the old airport in Hellenikon. To Sunday. Thursday National Technical University of Athens hosts the second international conference on «Construction in the 21st Century: Advancing Engineering, Management and Technology,» at the Divani Caravel Hotel. To Saturday. Tel. 210.772.1268 or log on to www.ntua.gr. Bus drivers stage a work stoppage from 11 a.m. until 4 p.m. demanding a collective labor agreement. The first open one-day meeting on «Obesity and Nutrition» takes place at the King George Hotel in Athens. For details, tel 210.749.9300. Friday Institute of International Economic Relations (IDOS) holds a conference on «Global Political Economy and the New Challenges for Development,» to be held at Harokopion University in Athens, 70 El. Venizelou St. To Sunday. Tel. 210.428.6227 or log on to www.idec.gr/iier. Exergia energy and environment consultants holds a conference on «Biofuels,» at 9 a.m. at the Athens Imperial Hotel. Tel. 210.699.6185 or log on to www.exergia.gr.