Question

how was hydrogen harvested and fused if it is a gaseous element?

Answer 1

Using from natural gas...see:
http://en.wikipedia.org/wiki/Hydrogen#Industrial

Answer 2

it is not gaseous if it in a compund like organic compunds, or even on water there is the H2O (has two hydrogen atoms) , most of these can be separated or splited by making them react with other specific compunds.

Answer 3

so in regards to the hydrogen bomb, two solid states of hydrogen were fused?