PoliticsRussia grants new tax concessions for Rosneft and its BP joint ventureReduced gas production tax is intended to unlock investments to develop deep layers in West SiberiaTax concession: Russian parliamentarians listen to Prime Minister Mikhail Mishustin during a session of the Duma in Moscow, RussiaPhoto: SPUTNIK/REUTERS/SCANPIXVladimir AfanasievMoscow