Climate change, or global warming, has become an increasingly prevalent problem in our society over the years. Science is making great strides in predicting future correlations between nature and human events. Much evidence has been presented to the public to prove that climate change is and has been happening for years now. The five most prevalent lines of evidence are: radiative forcings, climate models, correlations, observed changes in climate systems above the norm, and unnatural changes in Earth's natural variation, such as increasing temperatures and ocean levels. What are radiative forcings? As noted in the 2013 IPCC report, radiative forcings (RFs) quantify changes in energy fluxes caused by changes in these drivers (natural and anthropogenic substances and processes that alter the Earth's energy budget) for 2011 compared to 1750. Positive RF leads to surface phenomena. warming and negative RF cause surface cooling. According to data collected from numerous sources for the IPCC, the total radiative forcing is positive, which has led to significant energy absorption by climate systems. The largest known contributor to total positive radiative forcings is caused by the increase in atmospheric concentration of CO2, since 1750. Climate models are there to support claims and theories of climate change. Climate models reproduce surface temperature patterns and trends observed at the continental scale over several decades, as reported by the IPCC, and have improved since Assessment Report No. 4 (AR4). These observations include those of rapid warming since the 20th century and cooling immediately after volcanic eruptions. Climate models are able to show us that all...... middle of paper ......s) are the only ones that need to change for the better. Works Cited "Glaciers | Weather Underground". Glaciers | Underground weather. Weather Underground, and Web. March 7, 2014. .Guggenheim, D. (Director). (2006). An Inconvenient Truth: A Global Warning [DVD]. Hollywood: Paramount.IPCC, 2013: Summary for Policy Makers. In: Climate change 2013: The basics of the physical sciences. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change [Stocker, TF, D, Qin, G.-K. Plattner, M. Tignor, SK Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and PM Midgley (eds.)]. Cambridge University Press, Cambridge, UK and New York, NY, USA. Otto, Shawn Lawrence. “Democracy in the Age of Science.” 2009, St. Peter, Minnesota. Opening speech.