Ключевые слова: agricultural, agriculture, bio, bioenergy, biogas, biological, biomass, building, business, climate change, countryside, ecology, electric utility, electricity, enclosure, energy, environment, environmental, environmentalism, factory, farmer, farming, fermenter, field, fuel, gas, green, industrial, industry, methane, natural, natural gas, nature, organic, plant, power, power plant, production, protection, rapeseed, raw material, renewable, renewable energy, sustainability, technology,