context1: Exact figures on numbers of total plant species are <strong>hard</strong> to give, as biologists stumble upon species yet unidentified by the scientific community. In one study, the National Museum identified 1,551 trees in a single hectare, with 123 species of trees, and of this number, 54 are found nowhere else in the world. Hence, it has been proclaimed as one of the world’s most diverse and <strong>dense</strong> forest.
context2: Steel, being significantly less <strong>dense</strong> than lead, requires larger shot sizes, but is a good choice when cost is a consideration. Steel, however, cannot safely be used in some older shotguns without causing damage to either the bore or to the choke of the shotgun due to the hardness of steel shot. Since tungsten is a very <strong>hard</strong> metal, it must also be used with care in older guns.