So far, the Belletieners in Oceanview had shown no inclination to shut down their systems to avoid detection, though the force to the south, in The Cliffs, had apparently started to shut down unnecessary emissions.

A simple spark, when delivered at precisely the right moment, can mean the difference between a smooth running and powerful engine that operates cleanly and an engine that runs rough, lacks power and produces unnecessary emissions.

Consider using enclosed gunwashing machines to avoid unnecessary emissions, recover the solvent used in spray-gun cleaning and allow its reuse within the machine.

Every day millions of litres of fuel are wasted and unnecessary emissions are produced because of aviation delays and aircraft in transit across Europe's skies.

We must reduce all unnecessary emissions and reduce transport.

Noting a set of talking points issued by the agency, Mr. Segal said, the dispute over the definition of routine maintenance "has deterred companies from conducting badly needed repairs, resulting in unnecessary emissions of pollution and hazardous conditions at these plants."