Respuesta :

Biomass is the source of almost half of all renewable energy in the United States. 

Answer:

Biofuel.

Explanation:

Renewable energy in the United Stated is mostly sourced from Biofuel with an 22.4% of all renewable sources used.

Biofuel comprehends fuels that are made from organic material, exactly, biomass.

Biomass is plant or animal material used as energy, like forest residues or animals waste.