Global warming, also known as global warming or global warming, is a phenomenon of increasing the temperature average of oceans and the atmosphere, wide world over several years. In its common meaning, the term is applied to a trend towards global warming measured during the last decades of the twentieth century. An Intergovernmental Panel on Climate Change, IPCC, develop a scientific consensus on this issue. His latest and fourth report, which was attended by more than 2 500 scientists from 130 countries says that the probability that global warming since 1950 is anthropogenic is over 90%. These conclusions were endorsed by more than 40 scientific societies and academies of science, including all national academies of sciences of the major industrialized countries.
The projections of climate models presented in the IPCC’s latest report indicates that the surface temperature of the globe is likely to increase by 1.1 to 6.4 ° C additional to the twenty-first century. The differences between the projections from the use of models with different sensitivities to the concentrations of greenhouse gas emissions and using different estimates for future emissions.Most studies focus on the period until the year 2100. However, the warming is expected to continue beyond that date even if emissions stopped because of the large heat capacity of oceans and the life of carbon dioxide in the atmosphere.
This implies high human impact and environmental medium and long term. Uncertainties on the rise in temperature overall average remaining because of the accuracy of models used, and state and individual behaviors present and future.The economic, political, social, environmental, or moral, is major, they give rise to many debates, internationally, as well as controversy.
