Introduction The aim of this report is to assess the extent to which anthropogenic greenhouse gas emissions are responsible for recent global climate changes (Karl and Trenberth, (2003 ), and identify key uncertainties associated with future climate modeling. These questions are first explored by analyzing the effects that natural causes such as solar volcanic eruptions and solar production have had on recent human-emitted global climate and the observed effects. Of Finally, uncertainties about future emissions and climate modeling are discussed, along with their associated implications.3 through increasing the greenhouse effect. This is where solar radiation travels through the surface, which then absorbs and reflects the atmosphere back to the Earth's surface, which absorbs and reflects this energy at the IR wavelength (700 nm). -1 mm). About 70% of solar energy is absorbed by the Earth's surface and below. atmosphere, while the rest is reflected back into space through clouds and albedo (NASA, 2013). The absorbed radiation warms the planet (Fig. 2) by being re-radiated into the atmosphere, where some is absorbed by greenhouse gases such as water vapor and carbon dioxide. These gases then radiate that heat back to Earth, warming the lower atmosphere and surface, thus enhancing the heating they get from direct sunlight (NASA, 2013). So we need to look at which outside... middle of the card. .....energy is put into action, a doubling of CO2 in the atmosphere will result in a 1.5-4.5°C increase in global surface temperature4. Results and interpretation The range of IPCC global surface temperature predictions is quite wide from one year to the next. This is due in part to the uncertainty of future emissions, but also, perhaps more importantly, to uncertainties in climate modeling. This is because, while the effect of increasing greenhouse gas emissions on the climate is well understood, the effects of several positive feedback loops as a result, are not, and are therefore not adequately taken into account in the models.5. ConclusionSo, to summarize: Anthropogenic climate change occurs due to increased greenhouse effect and carbon sink deforestation. Recent climate change is partly due to volcanic eruptions and changes in solar production, but a