Question

what percent of solar radiation is filtered by clouds and may cause sunburn on cloudy days?
○ 3 percent
○ 14 percent
○ 22 percent
○ 31 percent

Explanation:

Clouds can filter solar radiation. However, a significant portion of UV radiation (which can cause sunburn) can still penetrate. Research indicates that about 31 percent of solar radiation (including relevant UV - related components that can cause sunburn) can pass through clouds.

Answer:

31 percent