독해 문제 – 28번 (2024 광운대 A형) 지문 원문 The sun produces large amounts of visible light during the day. The problematic light is ultraviolet light.
It contains more energy than visible light and it is this light that causes suntan, sunburn and even skin cancer. Recently the amount of ultraviolet light reaching the earth has increased, especially around the North and South Poles.
In the past there was a thick ozone layer, but as man-made pollutants have reduced the layer, more and more ultraviolet light...