Considering vegetation, it is claimed that, due to an increase in precipitation and global temperature, a change in the type, distribution and coverage of vegetation can be observed. It has been also report that estimated global land precipitation has increased by approximately 2% over the course of the 20th century and similar slight overall increase in global river runoff and in average soil moisture has been perceived. The study of air trapped in bubbles in the ice core from the Antarctic has shown a link between temperature and global sea level variations. And, it has been also report that global average sea level has rose at an average rate of around 1.8 mm per year over 1961 to 2003 and at an average rate of about 3.1 mm per year from 1993 to 2003