Really we ought to price in the genuine cost of countering whatever emissions a product or service causes. My guess is that the effect that would have on demand for different product and services would surprise us, in that I don't think we understand very well where people would cut when externalities are priced in, partly because we're bad at estimating what value people put on different things, and partly because we're bad at assessing what impact different things has when e.g. factoring in supply lines.