There's more to good environmental policy than CO2. So many of these apple A to apple B comparisons come out close to a wash. Disposable diapers vs. cloth diapers? Situationally dependent, but total environmental impact is pretty much a toss-up.
The tie-breakers for me come in the form of incremental reductions of total consumption, circulating more money in the local economy (as happens with $$ spent on services compared to $$ spent on goods), and ethical/moral issues (as murky and subjective as they can be).
It's definitely true that a lot of the 'green' actions we take are actually counter-productive (e.g. buying a new Tesla instead of a used car or just keeping what you already have, etc.)
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