The Orion nebula

Also called Messier 42 or NGC 1976. I'ts in the constellation of Orion..

It is at 1270 light years from Earth. For this photo I took 184 photos of 15 "to ISO 400, with a UHF antipollution filter and a modified Canon 450D camera.
My observatory is located in a place with terrible light pollution.
Does anyone know how to eliminate the light pollution in our cities?
This photo was taken on 2012/12/12 but the process was done 2013/02/20

Old Photo - new treatment

This is a photo taken on Oct. 3, 2012. This time I processed the photo reducing the noise coming from the artificial light of the city.
This is the Lagoon Nebula.
This nebula is also called Messier 8. It is located in the constellation Sagittarius, about 5,000 light years.