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
Heaven and Earth (book) argues that "It's got nothing to do with the atmosphere, it's about what happens in the galaxy" and that climate is driven by the sun, the Earth's orbit and plate tectonics rather than the levels of atmospheric greenhouse gases such as carbon dioxide. Plimer says his book is for the "average punter in the street" who can "smell something is wrong in the climate debate but can't put a finger on what." Critics have regularly questioned Plimer about his commercial interests in the mining industry, but he defends the independence of his views, saying that these commercial interests do not