1.   Before and after they were fired, Twardzik and Adelman defended themselves by saying the cleanup task was too great to finish in two years.

2.   A strong stench makes the cleanup task more challenging.

3.   Many of our practices in the past, while acceptable and legal at the time, have created an extensive and expensive cleanup task.

4.   Russia faces enormous cleanup tasks from Soviet-era radiation accidents and illicit dumping at sea by the Soviet and Russian navies.

5.   The greatest concern is the quality of air inside buildings, where measurements and cleanup tasks were largely left to building managers and residents.

6.   But the departure of the troops left states of the former Soviet Union with a huge cleanup task.