R-410A bromine or chlorine, R-410A (which contains only fluorine) does not contribute to ozone depletion, and is therefore becoming more widely used, as ozone-depleting refrigerants like R-22 are phased out. However, it has a high global warming potential (1700 times the effect of carbon dioxide), similar to that of R-22. Since R-410A allows for higher SEER ratings than an R-22 system, by reducing power consumption, the overall impact on global warming of R-410A systems will be substantially lower than that of R-22 systems due to reduced greenhouse gas emissions from power plants. R-410A R-410A, sold under the trademarked names AZ-20, EcoFluor
Global cooling into the public consciousness". In the 1970s, the compilation of records to produce hemispheric, or global, temperature records had just begun. Spencer R. Weart's history of "The Discovery of Global Warming" states that: "While neither scientists nor the public could be sure in the 1970s whether the world was warming or cooling, people were increasingly inclined to believe that global climate was on the move, and in no small way." On January 11, 1970, the Washington Post reported that "Colder Winters Held Dawn of New Ice Age". In 1972, Emiliani warned "Man's activity may either precipitate this new ice age