An interesting but not surprising finding about energy demand for poor families: here. It is probably well-known that it is more expensive to be poor. And expensive here means relative to the income. For example, a poorer family would need to spend a larger portion of their income on basic stuff like food, gas, or clothes. In this finding, looking at this from a global warming point of view, a poorer family on average tends to spend more energy than a richer one because they often use less efficient sources of energy (e.g., wood or coal vs. electric) and need more steps for the same thing (e.g., boil vs. filter drinking water). This made me believe even more that to fight global warming, instead of slowing down development, we need sustainable development.