Paleobotany is the study of plant remains from geological contexts to reconstruct past environments, the evolutionary history of plants, and their bearing on the evolution of life. It includes the study of terrestrial and marine plant fossils. Plant fossils can be preserved in various ways, each providing different types of information about the original plant, such as impressions that provide morphological details, petrifactions that show cellular structure, or charcoalified remains that preserve fine morphology. Paleobotany is important for reconstructing ancient ecological systems, climate, and the development and evolution of green plants.