Trees in the Philippine Normal University-Manila were studied to see how well they store carbon dioxide. By measuring tree height and width, researchers calculated that all the trees in the campus sequestered around 12.7 million pounds of carbon dioxide. Interestingly, Swietenia spp. trees were not good at this, while Gmelina arborea trees were the most efficient, with Ficus stipulosa holding the title for the tree that stored the most carbon dioxide. This research could help the university decide which trees to plant based on how much carbon dioxide they can pull from the air.