This is exactly what the climate deniers will do.
Right now, their objective is to filibuster and obstruct until damage is inevitable and its evidence is incontrovertible. (Of course, it is inevitable, but they can still argue effectively among themselves that "the science isn't in.")
After that is achieved, they will continue to obstruct by saying (Oh, Gee!) it's too late to have any observable effect ("if only we'd known!"). Which will be technically correct, since the damage that's been done will only be reversed by a couple centuries of thoughtful conservation and innovation.