A suggestion is that everyone learn to build a rocket stove. Where we are we have reliable water and natural gas. However, a good earthquake and the water mains break, gas lines rupture. What to do? I have a propane gas grill and always have several bottles around. In addition I have a Coleman camp stove. What if I get to the point of being out of propane without a way to resupply? I build a rocket stove. Simple, very efficient and easily powered by small bits of wood, tree branches, etc. Look at Youtube for a video tutorial on how to build one.