even few year the Taj mahal gets a mud bath to remove mysterious yellow brown stains form the white marble. environmental scientist mike begin thought that if he could find the cause of the stains people could better protect the tomb. In 2012 he placed marble tiles on the monument for tow months then used a special high powered microscope to look at the stained tiles. He found thing particles of pollution from car and the burning of wood trash and dung. The pollution absorbed light instead of reflecting it which created the stain. As a result the Indian government restricted burning trash and driving car near the monument to help decrease the staining pollution. once you know the problem begin says you can make polices to fix it. words clean the Taj mahal with clay then wash it off with distilled water. from called book national geographic kids https://kids.nationalgeographic.com/explore/history/african-american-heroes/sojourner-truth/
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