If tree creates any pollution

Answer 1

Trees create several types of pollution:

* Pine trees and similar emit turpenes and related volatiles. This is the blue haze you see over coniferous forests * Trees release pollen, a potential allergen * Oak leaves and pine needles have tannins in their leaves/needles which can pollute water * Decomposing trees emit carbondioxide * When in a forest fire trees emit smoke and particulate * At night tree respiration releases carbon dioxide * Some trees have irritating saps