What is the relationship between biomass and steam in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

And it is not alone: cities and towns across Italy are embracing hydroelectric power, geothermal energy, wind farms, solar panels, steam generators and biomass plants, due largely to generous state subsidies.

Answer: distributed_by