Jail for them.
Why? Nobody else has gone to jail yet.
All those years ago, when this crap was being ramped up, those Climategate e-mails showed the climate office in England that collected the world-wide data not only adjusted most of the data points upward but then destroyed the original data base. Years worth of raw data was destroyed so they could create the fake global warming meme.
I do not think a copy of the real raw data has ever been found which means it is lost for real scientists to use forever.