Hence, the potential effects of any elevation of the present uv-B levels of sunlight reaching the earth's surface should be taken most seriously and studied thoroughly.
(sunlight; reaching; the earth's surface) (the potential effects of any elevation of the present uv-B levels of sunlight; should be taken most seriously; )
sunlight the potential effects of any elevation of the present uv-B levels of sunlight
reaching should be taken most seriously
the earth's surface