The Union of Concerned Scientists has produced a well-researched, interactive guide projecting the effects of climate change on New England if nothing is done — the cost of inaction.
For example:
In Boston alone, 18 inches of sea level rise are projected to exact cumulative costs of $13 billion by 2100—on top of $7 billion in “normal” flooding costs. And if sea-level rise reaches 33 inches by 2100, today’s 100-year coastal flood will likely occur every one to two years in Boston and Atlantic City, and every 11 to 22 years in New York City (Frumhoff et al. 2007).
