How many pounds of pollutants does one tree filter from the air each year?

Question

How many pounds of pollutants does one tree filter from the air each year?

Answer 1

It is not just the trees but every green plant.

Answer 2

Pollutants.... none.

Green plants only extract CO2 from the atmosphere. It's true that we are producing more CO2 but it's not generally regarded as a pollutant.

SO2, NOx and other hydrocarbons, gases emitted from vehicles etc pollute but are not filtered by plants.