Question

How did global warming reach such an extent without us noticing it sooner ?

Answer 1

besides changing climates which persisted over the a sustained period of time human activities are also activities that are most influential how global warming reach us sooner. 

Answer 2

Global warming has a direct impact on the continued melting of ice in the polar regions north and south poles . Greenland ice cap has melted nearly 19 million tons ! And the volume of ice in the Arctic in the summer of 2007 only a half of from 4 years earlier ! The melting of ice is currently running much faster than forecast models ever created by scientists . Some early predictions have been made ​​previously estimated that the polar ice caps will disappear in the years 2040 to 2100. But the annual ice data were recorded until 2007 to make them think again about the predictive models that have been made previously . Scientists recognize that there are key factors that they did not Include in the existing prediction models . By using the latest ice data , as well as a more accurate predictive models , Dr. H. J. Zwally