Mumbai A month after it took up the task of cleaning the oil spill, the Energy and Resources Institute (TERI) said the shores of Alibaug should be cleaned within the next 10 days but the Navy Nagar in Colaba was the worst-affected and the shores can be completely cleaned only in three months.

TERI director Dr Banwari Lal said it would take at least three more months to bring down the the level