The has been more than 100 fusion reactors built since the 1950s.
China. European Union. India. Japan. South Korea. Russia. United States all have tried and all have failed.
That's 60 years of trying and failing. At least Rossi has demoed over unity, that's more that the rest of the world can do. You better hope that Rossi can do the job or your world will be climate changed into a burnt out cinder. Get use to smoke of a burning world.