An international team of scientists have found that Antarctica has lost nearly three trillion tons of ice over the last 25 years, mostly due to global warming. <br /> The study, published in the journal Nature on Wednesday, also found that the accelerating thaw has caused global sea levels to rise by more than seven and a half millimeters over the same period. <br />Almost half of the lost ice has come just within the past five years.<br />Scientists say, at this current rate, Antarctica alone is now on track to raise world sea levels by about 15 centimeters by the year 2100. <br />
