Over 90% of this pollution comes from farm runoff.

"How much pollution is coming from the 45 barrels versus the one barrel?"

When I checked to see where the pollution was coming from, about 20 percent was really from the manufacturing side.

Electroplaters say Americans do not understand that the pollution comes from making products that they must have.

Niall formulated in his mind the question: where did this pollution come from?

Officials say the higher mileage standard is important because most pollution comes from old cars.

The pollution comes from power plants, factories, automobiles and various other sources.

Other investigators are challenging assumptions about where pollution in New York comes from.

With the expansion of trade came congestion and pollution.

What if the pollution is coming from somewhere else?