Greenhouse effect,artwork. The greenhouse effect is a process by which the Earth warms up. It occurs naturally,but there are concerns that human activities may be increasing its effect,leading to global warming. The surface of the Earth absorbs some solar radiation (yellow arrow),reflects some,and re-radiates some at a longer (infrared,IR) wavelength. Naturally some of this IR passes through the atmosphere back into space,but the build-up of some chemicals in the atmosphere can change its absorbance of radiation. Carbon dioxide,which is emitted by the burning of fossil fuels,is a major greenhouse gas. Global warming could have dire consequences for the planet | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hks, Gary |
Taille de l’image : | 2511 px × 2700 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |