(i)Narrowly ultitrian arguments for conserving biodiversity are obivous.Humans derive countless direct economic benefits from nature- food,firewood, industrial products and products of medicinal importance.
(ii)Broadly utilitarian argument says that biodiversity plays a major role in many ecosystem services that nature provides.The fast dwindling amazon forest is estimated to produce,20 percent of the total oxygen in the earth’s atmosphere through photosynthesis.