[jedharris]

Changing the laws or enforcement will take a while and software won't help directly. But extensive crowd-sourced measurement of externalities would be a big deal and software should help with that.

Actual measurement (and definition) of externalities will be very diverse, so the tracking will have to evolve and expand. Crowd-sourcing can handle that.

Once externalities can be clearly documented, public opinion will shift and companies will start to change their behavior in response. Then enforcement and laws will follow.