they are trying to find a way in nhk world, nagga saki. . >> researchers in japan made a discovery that could help clean out the air we breathe and found a substance that can neutralize common pollutants. so products can be put to work. representatives of the large corporation based in tokyo visit a factory in a city in hokaido. this is what they have come to see. oil extracted from the needles in the fruit trees that grow in the area. >> it smells like a fresh forest. it's amazing technology. >> the oil is attracting attention because it neutralizes air pollutants like jit jen dioxide. it's found in all kinds of sources. staff at a national research snud placed hi institute placed it in a bag and when it came in contact with a solution, it turned yellow. when the two substances were poured through a filter soaked in oil from fur trees, the solution remained clear. an element in the oil bonded with the nitrogen and neutralized it. researchers tested the oil of 20 different types. the oil removed almost all of the nitrogen dioxide. in 1954, a typhoon wiped out the forests to ensure a sta