Pre Timeskip had the environment be as much of a threat as The Marines and Pirates in Paradise.
Post Timeskip. A lot of the environment is man made(Punk Hazard, Tottoland etc) and the environment is barely a threat compared to the Yonkos and Doflamingo.
Post Timeskip. A lot of the environment is man made(Punk Hazard, Tottoland etc) and the environment is barely a threat compared to the Yonkos and Doflamingo.