Jan. 6 (UPI) -- Half of the world's glaciers will melt and disappear before the turn of the next century, according to alarming new research that predicts greater fallout from global warming despite meaningful efforts in recent years to address environmental concerns. The study, published Thursday in the journal Science, projects that nearly 50% of the Earth's natural ice will dissolve by the year 2100, which is much quicker than scientists previously calculated if the planet warmed by only 1.5C -- a benchmark set by hundreds of nations to cut emissions and protect more land for nature and the environment....