When the endangering is based on meth manufacturing, what are some good topics and questions to hit on during voir dire?

Use a series of the "how many of you would be suprised if you where to hear testimony in a given case that ...?" and lay out one at a time some of the specific dangers that you expect your witnesses to talk about.

How many of you store filled propane bottles in you home? Mr. Smith, why don't you do that?
Evidence of "immediate" danger is what the courts hang up on, so try to work the immdiacy into your dialog with the jurors you are addressing individually.