Ключевые слова: agricultural education, agriculture, alternative, blue, bodenkultur, brassica napus, co2, coal, crossgreen flowers, energy, energy shortages, environmental protection, farm, farmers, farming, field, field crops, field ordering, fuel, grain, grass, green, meadow, neutral, oil, peasants, pollution, power, rape, rapeseed, rapeseed oil, rapsblume, rapsfeld, sky, sky roof, solar energy, the environment, vordemwald, yellow,