Is fusion energy a realistic solution to climate change within 20 years?
I've been following the fusion energy scene for over a decade, and private companies like Commonwealth Fusion Systems keep pushing their timelines back while public projects like ITER face endless cost overruns. But the recent NIF ignition result in December 2022, which produced 3.15 megajoules from 2.05 megajoules of laser energy, was a genuine scientific milestone even if it's not net power for the grid. My question is: should we bet heavily on fusion energy as a realistic solution to climate change within the next 20 years, or are we just chasing a pipe dream that distracts from practical renewables and fission? I lean skeptical because every practical breakthrough in fusion is still decades away from commercial viability, and even optimistic roadmaps suggest we won't see a working power plant until 2050 or later. When you consider that solar and wind are already scaling rapidly and battery storage costs have fallen by 90% since 2010, I worry that fusion hype is siphoning billions from more immediate climate actions. Yet I also recognize that fusion could offer baseload power without the long-lived waste of fission, so maybe it's worth the R&D. Do you think fusion is a smart investment of public money, or should those funds go into proven tech today?