Yale Environment 360: Sea levels are rising faster than they have in at least 28 centuries, according to recent research, and by 2100, they are expected to rise by one to four feet -- possibly even higher. If emissions go unchecked and polar ice sheets melt on a large scale, global sea levels could climb by dozens of feet in the coming centuries. From Shanghai and Mumbai to New York and Buenos Aires, even a few feet of sea level rise threatens to flood homes and highways, inundate sewage treatment plants, and contaminate...