People are responsible for more carbon dioxide emissions into the atmosphere, while the Earth is now in the Little Ice Age, or just beyond. All of these factors have been the basis for years of discussions on the main causes of climate change and the increase in temperature as a consequence of natural or man-made changes and their consequences; even if this leads to global warming or cooling of the Earth. In their articles, “Global Warming Is Eroding Glacial Ice” by Andrew C. Revkin and “Global Warming Is Not a Threat to Polar Ice” by Philip Stott, both authors discuss these two theories (Revkin 340; Stott 344 ). Revkin is right when he says global warming is happening. A significant increase in carbon dioxide in the atmosphere is due to human activities combined with natural factors such as volcanic emissions and solar radiation – which together lead to climate change and rising temperatures. At the same time, other factors such as deforestation contribute to environmental changes for some glaciers no less than air pollution. However, during global warming not all regions of the planet are affected equally, both local warming and cooling are possible during these changes. First, in recent decades the Earth is experiencing a greater rate of increase in temperatures due to greenhouse gases that are produced by human activities rather than for environmental reasons, such as solar or volcanic activities. In 2006 the President of the National Academy of Sciences declared: “There is no doubt that the Earth is warming”, he further added that people are at least partly responsible for these changes in addition to normal factors (Cicero, par. 4). Natural factors have produced climate fluctuations on Earth for several million years. Humans have only affected the Earth's atmosphere for nearly one hundred years, since the Industrial Revolution began (Revkin 340). Of course, it is unfair to say that global warming is entirely man-made. For example, people cannot have any impact on the Earth's position relative to the sun, or on galactic density, or on natural events such as atmospheric emissions of volcanic gases. As a result of these environmental factors, Earth usually had higher rates of temperature fluctuations during the preceding millions of years than in subsequent centuries. On the other hand, people are responsible for the highest concentration of greenhouse gases in the atmosphere in the last 650,000 years due to industrial production, driven by increased consumption (Lindsey, par.