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.
A sweet acacia tree in your bee and butterfly garden will add interest and a heady scent. The yellow flowers on the acacia tree pop out in early spring to lure bees and butterflies in. A kidneywood tree produces white blossoms throughout the entire growing season to attract pollinators.