Opinion: Keeping the oceans back from the shorelines   On the
same day, a group of climate researchers released calculations
that indicate the world's oceans are rising 60 percent faster
than the U.N. Intergovernmental Panel on Climate Change
anticipated five years ago. Projecting how Greenland's ice will
behave in a warming world or what will happen to the polar ice
caps decades from now is difficult. But sea levels appear to be
on track to rise by several feet over the next century, with
every inch putting more Americans at risk.   Protecting New York
City, America's skyscraping metropolis, from the advancing ocean
is likely to be one of this century's great infrastructure
investments. Some work, such as constructing sea walls and
retrofitting subway entrances, is already happening. Part of
Cuomo's $42 billion request includes money to prepare for the
next storm -- funding for waterproofing electrical
infrastructure, retrofitting sewage treatment plants or
floodproofing subway tunnels. The last is especiall