New York Times suggests that adding bike lanes can help prevent CO2-induced sea level rise of four feet by the 2080s

New York Faces Rising Seas and Slow City Action - NYTimes.com

Were sea levels to rise four feet by the 2080s, for example, 34 percent of the city’s streets could lie in the flood-risk zone, compared with just 11 percent now, a 2011 study commissioned by the state said.

New York has added bike lanes...
Five years ago, a summer-morning deluge brought about 3 1/2 inches of rain in two hours and paralyzed the system for hours, stranding 2.5 million riders.

That prompted the transit agency to spend $34 million on improvements like raising some ventilation grates nine inches above sidewalks and building steps that head upward, before descending, at flood-prone stations. All the money came from the agency’s capital budget, which also pays for subway cars and buses.

“This is a vicious circle of the worst kind,” Projjal Dutta, the transportation agency’s director of sustainability, said of the financial effect. “You’re cutting public transportation, which cuts down greenhouse gases, to harden against climate change.”