It was cleaned to prevent pollution and prepared to be diver safe.

The use of ice tools might practically prevent pollution and eliminate work piece contamination.

At the time, this was the most up-to-date method to prevent pollution from power stations.

Swift and firm enforcement can prevent pollution from occurring and can promote prompt cleanup and correction of existing pollution problems.

In larger commercial printers and copiers, a carbon filter in the air exhaust stream breaks down these oxides to prevent pollution of the office environment.