New York City is facing a difficult future because of climate change. As global temperatures increase, sea levels are rising, making the city more vulnerable to flooding.
This isn't a distant problem. Major storms have already caused billions of dollars in damage, flooding subway tunnels and neighborhoods, and showing everyone how serious the situation is.
To fight back, the city is planning huge projects. One option is a massive system of sea walls and gates to block storm surges. This would be a multi-billion dollar investment in the city's safety.
But walls are not the only answer. Experts also want to work with nature by creating "green infrastructure." This means building special parks and gardens designed to absorb rainwater and coastal overflow before it causes damage.
Deciding on the right mix of solutions is difficult and expensive. However, taking action is necessary to ensure New York can survive the challenges of a changing climate.