rising seas

Guyana, one of South America's poorest countries, is under severe threat by rising seas. That had made it a champion of climate action, but it all changed when ExxonMobil found oil off its waters.

Research published this week finds that home sales volume and prices have declined in coastal census tracts vulnerable to sea level rise, relative to coastal areas less threatened by climate change.

Rising sea levels are not the only threat to Venice. As residents continue to leave, the city risks becoming an empty shell sinking under mass tourism. Some 30 million visitors arrive every year.

Identifying where ice melts can help cities in planning for a future with elevated sea levels. In New York City, the sea level would be affected more by melting ice in northern Greenland than Canada.

"In the winter, the sea attacks us," a fisherman says. "We are afraid the village will sink into the sea." The World Bank says Egypt is among the countries most vulnerable to climate change's effects.

Sea level rise is not a new challenge for Florida. The state's earliest residents had to cope with rising seas by migrating. It is a lesson, an archaeologist believes, that we can learn from today.