Ключевые слова: attract, benefits, biofuel, biogas, biomass, causality, causation, cause, effect, electricity, empower, energies, energy, english, environmental, environmental preservation, ethanol, explain, geothermal, gives, hydro, hydroelectric, hydroelectricity, hydropower, importance, inspirational, kwh, leads to, magnet, metaphor, motivational, photovoltaic, power of, preservation, purpose, relation, renewable, renewable energy, solar, symbol, text, wind, word,