space traveler plants trees in alien worlds, reversing dystopia with greenery

space traveler plants trees alien worlds reversing dystopia greenery exploration conservation extraterrestrial vegetation cosmos journey terraforming planets reforestation environment flora astronaut horticulture biodiversity habitat sustainability rejuvenation transformation species earthlike galaxy botany restoration preservation growth survival forestry universe regeneration interstellar pioneer ecosystem reclamation planetarium expedition interplanetary renewal botanic starship colonization oxygen