Edit. After Black September's assassination of Israeli athletes at the Munich Olympics in 1972, Prime Minister Golda Meir okays a black-box operation to hunt down and kill all involved.
Yellow pollen is produced by evergreen trees, primarily pine trees, including spruce, true cedar trees, fir trees, larch and hemlock. Although yellow pollen looks like it could cause an allergic reaction, in reality it does not trigger allergy symptoms at all. It can stain the skin and clothing, however.
Carotenoids and another pigment, xanthophylls, are responsible for the yellow and orange colors in corn, carrots, pumpkins and daffodils, as well as leaves. (Xanthopylls are also found in egg yolk and human blood plasma.) They are present in leaf cells during the growing season, protecting chlorophyll from damage.