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Nature’s Pharmacy, Our Treasure Chest: Why We Must Conserve Our Natural Heritage

Medicinal plants grow naturally around us. Over centuries, cultures around the world have learned how to use plants to fight illness and maintain health. These readily available and culturally important traditional medicines form the basis of an accessible and affordable health-care regime and are an important source of livelihood for indigenous and rural populations. Increasingly, medicinal species that reside in natural areas have received scientific and commercial attention. In the United States, of the top 150 prescription drugs, at least 118 are based on natural sources. A child suffering from leukemia in 1960 faced a 10 percent chance of remission; by 1997, the likelihood of remission had been increased to 95 percent thanks to two drugs derived from a wild plant native to Madagascar. But we still know little about the treasure trove inhabiting our wild places. As of 1995, less than 1 percent of all tropical plant species had been screened for potential pharmaceutical applications. As medicinal plants receive increased scientific and commercial attention, there is increasing pressure on the wild plant populations from which most medicinal plants are harvested. Overharvesting has placed many medicinal species at risk of extinction. Commercial exploitation has also sometimes led to traditional medicines becoming unavailable to the indigenous peoples that have relied on them for centuries or millennia. For all of these reasons, the study and conservation of medicinal plant (and animal) species has become increasingly urgent. The accelerating loss of species and habitat worldwide adds to this urgency. Already, about 15,000 medicinal plant species may be threatened with extinction worldwide. Experts estimate that the Earth is losing at least one potential major drug every two years.


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