Dirtiness of thermonuclear bombs 

An unsupported statement is made that "... the smaller a thermonuclear bomb is, the "dirtier" it is ..."
This is misleading, if not untrue.

Bombs are optimised for an entirely different purpose. It is true that in small and large bombs, the bulk of the yield is from fission, but this is a design decision, and can easily be eliminated by using a non-fissile tamper material. The secondary of a small multi-stage bomb is just another boosted fission stage, fusion yield negligible. The largest bomb ever tested (~50MT) was fairly clean, but only because the fissile tamper was removed from the secondary to reduce contamination. Small ultra-clean bombs have also been tested.

The article is about the current art of laser-driven ICF. Fission-driven ICF was the first mechanism used and has been proven, so a summary definitely belongs here. The details of using large explosions for power belong in another more general nuclear power article.