Required seawalls coyuld cost almost as much as the interstate highway program

Guardian -Defending against rising seas could cost US communities $416bn in the next 20 years, according to a new report. Spending on seawalls alone could total almost as much as the initial investment in the interstate highway system, the authors said. And the billions involved will represent just a fraction of adaptation efforts governments in coastal states will have to fund if they do not want to simply retreat.