Unfortunately it's never that easy. Should you be able to blast music at high volume outdoors if you pay a nuisance tax? If your wood burning stove heater make

Unfortunately it's never that easy. Should you be able to blast music at high volume outdoors if you pay a nuisance tax? If your wood burning stove heater makes the nearby aqi shoot up, is that ok if you pay for someone else to upgrade to a efficient furnace? What about embedded manufacturing energy? Should the government not only tax CO2 within it's borders but also somehow audit CO2 for the entire supply chain? If not, some nation will make the call that fossil fuel burning is an externality that they can avoid paying. Let's also admit that none of us can build an computer or a car from raw materials. Even if you would pay a premium for an efficient machine, most consumers don't understand what the future energy costs to them are going to be, will not demand efficiency, and thus suppliers will not build it. Apartments are rarely well insulated because the renters are rarely willing to pay more in rent to save more on energy costs. As much as we'd like everyone to make rational decisions about complex transactions, most people will not. Im not arguing for stupidity even. At the level of the individual, the savings available by analyzing the options are smaller than the cost of the analysis. Its not worth much of my research time save $1 / yr in extra power efficiency. But across an industry it is.