Google-backed nuclear fusion company Commonwealth Fusion Systems (CFS) has raised an additional $1 billion in equity financing, bringing its total raised to $4bn.The financing follows its $1.8bn Series B funding round completed in 2021 and an $863 million raise completed last year. According to CFS, the raise represents 30 percent of the total raised by all fusion companies.“CFS is making what once was impossible into inevitable. In the 2030s, we will put commercial fusion on the grid. We have t...