none of them are renewable if you take the long viewA bit different when renewable energy relies on stuff that just "renews":
Hydro
Wind
Tide
Solar
Once it involves "byproducts" then it is the tip of a clusterfudge IMO
--- Feed gorse into the things, it is biomass, bet it takes less energy to produce a ton of dry gorse than a ton of dry straw - when all the gorse is gone, make a "dynamic assessment" FFS
You must get things into perspective
Energy cannot be made or destroyed it can be changed or "lost"
Is any energy source infinitely renewable