Why not help them build a Dakota fire pit? It's essentially just a big hole with an air intake tunnel, so that fires in the pit combust more completely, with a

Why not help them build a Dakota fire pit? It's essentially just a big hole with an air intake tunnel, so that fires in the pit combust more completely, with a very significant reduction in smoke and particulates. You probably can't do anything about them being ideologically inconsistent with respect to burned fuels as an energy source, but you can reduce their impact on yourself and your mutual neighbors.