Using a stove does not always mean having to carry fuel with you, although in some places that might be the only sustainable practice
One of my old favourite stoves is a simple “Hobo stove” made from a cutlery stand that can be used with whatever natural fuels are available.
Winter conditions often require the use of a stove to melt ice or snow and I find a hobo stove with an alcohol burner is ideal for this job too.
Of course the other important reason sometimes to not light a fire is that it may leave unacceptable traces in an otherwise pristine environment.
For the same reason disturbed ground should also be replaced after using a stove. there should be no sign that you have been there when you leave a site and this includes not leaving food scraps and litter all over the place. If it was light enough to bring with you then take it home too.
You can see my current hobo stove set in the projects section.