Fred Bloetscher, professor of civil, environmental and geomatics engineering in Florida Atlantic University in Boca Raton, Florida, speaks during the U.S. Senate Commerce, Science and Transportation ... more 
Fred Bloetscher, professor of civil, environmental and geomatics engineering in Florida Atlantic University in Boca Raton, Florida, speaks during the U.S. Senate Commerce, Science and Transportation Committee hearing on sea-level rise and coastal resilience inside commission chambers in Miami Beach City Hall, in Miami, Florida, April 22, 2014. The hearing, entitled, "Leading the Way: Adapting to South Florida's Changing Coastline" is being chaired by Florida U.S. Senator Bill Nelson on the 44th anniversary of Earth Day. South Florida, with a population of 5.5 million is considered by many environmentalists to be ground zero for sea level rise. REUTERS/Zachary Fagenson (UNITED STATES - Tags: POLITICS EDUCATION ENVIRONMENT) less 
1 / 24
Reuters | Photo By STRINGER / Reuters
Tue, Apr 22, 2014 6:55 PM EDT