https://heartland.org/wp-content/uploads/2025/04/Apr-25-ARC-Scorecard.pdf

Adding together the above numbers yields the following affordable, reliable, and clean total scores, with lower scores being closer to perfect power sources and higher scores being least compatible with the affordable, reliable, and clean ideal:

Natural gas - 3
Nuclear - 6
Hydro -7
Coal - 8
Biomass - 12
Wind - 22
Solar - 23