Rising sea level is the most profound long-term aspect of climate change. Yet, the public is almost completely unaware of the magnitude of the problem. For three million years sea level regularly moved up and down almost 400 feet with the ice age cycles. Now, after 6,000 years of minimal change, we are entering a new era of rapid sea level rise. In clear, easy-to-understand language, this book explains how, why, and what will happen.