Requests for Startups: Energy

YC has published the Requests for Startups. https://www.ycombinator.com/rfs I like it. At the same time there are some things that I think are missing, one of them is energy. This is especially important in the AI era but it was also before for more general reasons. A cheap and reliable access to energy is a important factor to the development of many other sectors in a region.

There are many projects to solve the energy problem: fusion, space, nuclear... But this is far from being solved. Why doesn't YC mention energy in that list?