New York City steam system

The New York City steam system is a network of pipes that run underneath the city. These pipes are filled with steam, which is a hot gas that comes from natural gas or other fuels. The steam is very hot and can be used to help heat buildings and power machines like air conditioners and refrigerators. The pipes in the system can also be used to transport hot water to places where it's needed. As the steam travels through the system, it gets cooler and can be used to help cool down buildings as well.