To get rid of waste generated by thousands of sailors aboard each of its aircraft carriers, the US Navy is using a process called pyrogenesis. In this process, waste is subjected to extraordinary heat. How is pyrogenesis different from the process of setting garbage on fire in a landfill

Its location.

Explanation:

The main difference between pyrogenesis and setting garbage on fire in a landfill is that pyrogenesis process occurs on the surface whereas garbage on fire in a landfill occurs inside the soil at certain depth. Pyrogenesis is an extreme thermal process that converts organic matter into gas made up of hydrogen and oxygen whereas garbage on fire in a landfill decomposes garbage that breaks down materials in simpler substances.