Oddly specific… What are you doing OP? Should we be worried? Honestly “faster than light” travel is already too generic: do you mean going actually FTL or breaking the space barrier with wormholes or space displacement shenanigans that “look like” FTL? That said, Earth destroyed in a few decades because of the research or the PRODUCTION of such method? A little bit of context would made answering this question way more interesting…