... to undertake a gargantuan task: calculate the value of all the services provided by all the ecosystems, from the forest to the floodplains to the open ocean, across the world... they came up with a number- $33 trillion a year- a headline-grabbing figure that was almost twice the global gross national product. Joe Roman
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Researchers have calculated that the value of all the services provided by all the ecosystems, from the forest to the floodplains to the open ocean, across the world is $33 trillion a year. However, this number was not obtained by counting fish, trees, birds, insects or other organisms in different places. Instead it was calculated by taking into account all of the services provided by nature to humans. These include oxygen production in forests, food production in agricultural areas, water purification in wetlands and carbon sequestration in forests. That’s an extraordinary amount of value for nature’s services to humanity!

Source: Listed: Dispatches From Americas Endangered Species Act

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