So we also need noise reduction at the emission sources.

Where low emissions sources are available, net production of pollutants can be reduced.

A second example of the need to target the correct emission sources relates to traffic.

Their generators aren't moving, they're just reshaping the main emission source.

Wave energy is a renewable, high availability, zero emission source of power.

My sensors detect a faint emissions source at 075 degrees.

And nobody was looking for this particular emission source.

She added, "They've gone after most of the large emissions sources, and off-road vehicles certainly deserve a close look."

Regional pollutants cause damage further from the emission source.

He walked around the pool to the wall where the nearest of the emission sources had been and examined the area with his tricorder.