Which of the following protects humans from the harmful effects of UV radiations?
The ozone layer is important because it absorbs ultraviolet (UV) radiation from the sun, preventing most of it from reaching the Earth's surface. Radiation in the UV spectrum has wavelengths just shorter than those of visible light. If this ozone layer became totally depleted, more UV rays would reach the Earth. Exposure to higher amounts of UV radiation could have serious effects on human beings, animals and plants. Skin cancers, sunburns and premature aging of the skin are a few effects of ozone depletion on human health.