Answer: What happens to the sun's radiation?
A small part of the sun's energy is directly absorbed, particularly by certain gases such as ozone and water vapor. Some of the sun's energy is reflected back to space by clouds and the earth's surface. ... Most of the radiation, however, is absorbed by the earth's surface
The Sun’s impact on the Earth
The air surrounding us consists of different gases and also some particles. This layer of air, known as the Earth’s atmosphere is retained by gravity. The two main components are nitrogen (78%) and oxygen (21%). Besides containing the oxygen human beings and other organisms need to live, the atmosphere has a number of other “features” such as absorption of ultraviolet radiation from the Sun by the ozone layer and heat retention known as the greenhouse effect.
The Sun and the Water Cycle
Earth contains about 1.4 billion km3 of water. The oceans hold 1.3 billion km3, and 71 km3 is fresh water, of which more than two thirds is in the form of snow or ice.
The Sun plays a key role in the hydrological cycle, constantly evaporating water into the atmosphere. Some of that water is returned as rain, snow and dew. Part of this precipitation is rapidly evaporated back into the atmosphere. Some drains into lakes and rivers to commence a journey back to the sea. Some infiltrates into the soil to sustain groundwater or soil moisture. Under natural conditions, the groundwater gradually works its way back into surface waters and makes up the main source of dependable river flow. Plants incorporate some of the soil moisture and groundwater into their tissues, and release some into the atmosphere in the process of transpiration. The hydrological cycle moves enormous quantities of water about the globe, all thanks to the energy from the sun.
World Water Day on 22 March every year focuses attention on the importance of water. The theme for 2019 is Leaving No One Behind. It adapts the central promise of the 2030 Agenda for Sustainable Development that as sustainable development progresses, everyone must benefit.
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