thought experiments for CO2 based opimised routing

scion_optimise_for_co2.yml

co2_optimising_example:
- options:
   - greenband
   - latency_then_bandwidth

# optimise for carbon intensity. Choose ASs which have advertise
# a carbon intensity per hour of less than 300 grams of CO2 per
# KwH, either by being in a place where the grid is green (Iceland),
# or where they are bringing down their grid average by sourcing power
# from renewables, or a charged battery to avoid drawing power when
# lots of fossil fuels are on the grid

greenband:
  - co2e: "<=300"

# optimise for cost, then latency. Cost is a often a good proxy for
# energy, but latency is important for a good browsing experience

latency_then_bandwidth:
  - cost
  - lat