Pretty much it's the same reason I'm a major proponent of Nuclear Fusion research.

We can easily get by on the non renewable sources we have now for centuries to come but the advantages and resources available by utilising hydrogen and nuclear fusion eclipses all the issues the left are 'worried about' with none of their costs.

That and if we are able to fully utilise nuclear fusion, we are getting railguns and militarised lasers very quickly after since one of the biggest issues is powering them and that solves it almost overnight.