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
Office of Oceanic and Atmospheric Research second generation of CHARM is underway to help answer questions about greenhouse warming effects on Great Lakes water quantity. NOAA researchers closely monitor the Earth's atmosphere searching for clues about long-term changes in the global climate. The data collected worldwide by NOAA researchers contributes to the understanding of complex climatic systems and the ability to forecast changes. NOAA Research organizations conduct research on the upper and lower atmosphere as well as the space environment. Their findings form the basis for NOAA's contributions to major national and international environmental programs and agreements. For instance, improvements in forecast and warning services provided