Ключевые слова: agriculture, astronaut, astronomy, background, beginning, botany, business, concept, cosmonaut, earth, echo, ecology, exploration, future, garden, gravity, green, grow, growing, growth, hope, leaf, life, man, natural, natures, new, planet, plant, planting, plants, rocket, science, seed, seedling, sky, soil, space, spaceman, spaceship, spring, sprout, sprouts, travel, tree, universe, wood, world, young,