Have those ever actually been produced? I thought that despite the theory being sound, there were other issues which so far had meant they were not possible to build with our current technology. If we don't have any, we can hardly be blamed for not planning to use them.
No, and they won't be until we figure out how to ignite hydrogen isotopes in that manner
without the energy of either a lot of lasers, a fission detonation, or whatever the magnetic confinement fusion method uses.
I'd imagine that antimatter-catalyzed fusion (where antimatter takes the place of a larger mass of plutonium) would be an example of a 'clean' atomic explosive, but that would require generating antimatter on a large scale. It's the only design that immediately comes to mind.
Anyway, other Megaprojects: Atlantropa is a favorite of mine. There's also Project Horizon (US Army project to build a fortress on the Moon defended by Claymore mines and Davy Crockett bombs).