Atmosphere of Earth development of animals. Today's atmosphere contains 21% oxygen, which is great enough for this rapid development of animals. "Air pollution" is the introduction into the atmosphere of chemicals, particulate matter or biological materials that cause harm or discomfort to organisms. Stratospheric ozone depletion is caused by air pollution, chiefly from chlorofluorocarbons and other ozone-depleting substances. The scientific consensus is that the anthropogenic greenhouse gases currently accumulating in the atmosphere are the main cause of global warming. On October 19, 2015 NASA started a website containing daily images of the full sunlit side of Earth on http://epic.gsfc.nasa.gov/. The images are taken
Carbon dioxide in Earth's atmosphere dioxide is often mentioned in the context of its increased influence as a greenhouse gas since the pre-industrial (1750) era. In the IPCC Fifth Assessment Report the increase in CO was estimated to be responsible for 1.82 W·m of the 2.63 W·m change in radiative forcing on Earth (about 70%). The concept of atmospheric CO increasing ground temperature was first published by Svante Arrhenius in 1896. The increased radiative forcing due to increased CO in the Earth's atmosphere is based on the physical properties of CO and the non-saturated absorption windows where CO absorbs outgoing long-wave energy. Atmospheric carbon dioxide