Nuclear power in Factorio - clean or dirty?

[XartaX]

Interesting article on the current state of fusion: http://www.forbes.com/sites/ethansiegel ... ar-fusion/

I like how they compared it to current shitty fission tech. That's like saying fission is superior to fusion because fusion costs more energy to maintain than it gives you (right now, but lets not mention that),

The resources are still finite, and in this case, incredibly rare. Materials containing fissile uranium or thorium are very hard to come by, particularly in large quantities.
Both the waste products and the reactants are radioactive: severe precautions must be taken not to contaminate the air, water or surrounding plant and animal life.
And finally, the risk of an environmental disaster — such as through a plant meltdown — carries with it Chernobyl-level consequences.

None of these are an issue with LFTR, for example,