Residue from a large oil spill in the Black Sea region will take more than a month and a half to completely clear, Russian officials said Thursday.
The Ministry for Emergency Situations. ministry said improved weather was helping the effort to clear the spill, which environmentalists fear could damage the area for years.
About 2,000 workers are being called on to clean up the oil which has washed up over the past few days. 
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CNN's Matthew Chance in Kavkaz and Max Tkachenko in Moscow contributed to this report.
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