Ключевые слова: agriculture, anaerobic, bio, biogas, biological, biomass, chimney, co2, conservation, construction, corn, digester, digestion, energy, environment, factory, fermentation, gas, global, green, grid, heat, industry, innovation, landfill, maize, manure, matter, methane, monoculture, natural, nature, organic, oxygen, pipe, plant, pollution, power, process, production, protection, recycling, renewable, resource, sewage, silage, smokestack, supply, system, tank, technology, thermal, waste,