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Abstract Cairo is considered as one of the high polluted cities in the world due to the increase of industrial activity specially in helwan and shoubra el - kheima, increasing of vehicles inside the city which exceed about one and half million cars, and also the increasing of population. We have made study about the effects of these pollutants on the solar radiation , the first location was hilwan, the srcond location was on the roof of institute of meterolog in abbasyia by using gorgie type actinometer at different spectral bands. |