Burning fossil fuels = not clean
Nuclear = not clean
Hydro = not clean
Solar = not clean
Wind = not clean
Tidal = not clean
Wood/biomass = not clean
Geothermal = not clean
*Add the word ‘clean’ in front of any of the above categories = not clean
Perhaps we need a new metric
Is there a rating system that could possibly compare all the elements of just how ‘not clean’ all of these producers could be?
Nuclear = not clean
Hydro = not clean
Solar = not clean
Wind = not clean
Tidal = not clean
Wood/biomass = not clean
Geothermal = not clean
*Add the word ‘clean’ in front of any of the above categories = not clean
Perhaps we need a new metric

Is there a rating system that could possibly compare all the elements of just how ‘not clean’ all of these producers could be?