WORLD / CROSS-BORDERS Simulations a warning for world By AFP Published: May 06, 2021 06:28 PM Limiting global warming to 1.5 C could halve how much sea levels rise due to melting ice sheets this century, according to a major new study modeling how Earth's frozen spaces will respond to ever-increasing greenhouse gas emissions. The polar bear cub plays with a sheet of plastic in Svalbard, a Norwegian archipelago about halfway between the mainland and North Pole. Photo: VCGSince 1993, melting land ice has contributed to at least half of global sea level rise and scientists have previously warned that the vast ice sheets of Antarctica were disappearing faster than worst-case scenarios.