Oil spill occurs in Tatarstan over an area of 2,000 square meters -- regulator / Russia suffering 'environmental catastrophe' after oil spill in Kerch Strait / Oil spill in Krasnodar Region contained -- monitoring data / Oil spill devastates Black Sea: long-term impact expected to last over 20 years / 'An ecological disaster': Russia deals with aftermath of massive fuel oil spill / Oil spills in Russian-occupied Crimea are an 'ecological disaster' / Damage after fuel oil spills may continue growing -- lawmaker / Oil spill near Black Sea after two Russian tankers seriously damaged in storm / Oil spill in Kerch Strait after two Russian oil tankers seriously damaged in storm