1.0Ecosystem Marketplacehttps://www.ecosystemmarketplace.comrich600338<blockquote class="wp-embedded-content" data-secret="UAFqj8LJTw"><a href="https://www.ecosystemmarketplace.com/articles/valuing-the-arc-five-year-experiment-draws-to-a-close/">Valuing the Arc: Five-Year Experiment Draws to a Close</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.ecosystemmarketplace.com/articles/valuing-the-arc-five-year-experiment-draws-to-a-close/embed/#?secret=UAFqj8LJTw" width="600" height="338" title="“Valuing the Arc: Five-Year Experiment Draws to a Close” — Ecosystem Marketplace" data-secret="UAFqj8LJTw" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /*! This file is auto-generated */ !function(c,l){"use strict";var e=!1,o=!1;if(l.querySelector)if(c.addEventListener)e=!0;if(c.wp=c.wp||{},c.wp.receiveEmbedMessage);else if(c.wp.receiveEmbedMessage=function(e){var t=e.data;if(!t);else if(!(t.secret||t.message||t.value));else if(/[^a-zA-Z0-9]/.test(t.secret));else{for(var r,s,a,i=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),n=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),o=0;o<n.length;o++)n[o].style.display="none";for(o=0;o<i.length;o++)if(r=i[o],e.source!==r.contentWindow);else{if(r.removeAttribute("style"),"height"===t.message){if(1e3<(s=parseInt(t.value,10)))s=1e3;else if(~~s<200)s=200;r.height=s}if("link"===t.message)if(s=l.createElement("a"),a=l.createElement("a"),s.href=r.getAttribute("src"),a.href=t.value,a.host===s.host)if(l.activeElement===r)c.top.location.href=t.value}}},e)c.addEventListener("message",c.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",t,!1),c.addEventListener("load",t,!1);function t(){if(o);else{o=!0;for(var e,t,r,s=-1!==navigator.appVersion.indexOf("MSIE 10"),a=!!navigator.userAgent.match(/Trident.*rv:11\./),i=l.querySelectorAll("iframe.wp-embedded-content"),n=0;n<i.length;n++){if(!(r=(t=i[n]).getAttribute("data-secret")))r=Math.random().toString(36).substr(2,10),t.src+="#?secret="+r,t.setAttribute("data-secret",r);if(s||a)(e=t.cloneNode(!0)).removeAttribute("security"),t.parentNode.replaceChild(e,t);t.contentWindow.postMessage({message:"ready",secret:r},"*")}}}}(window,document); </script> https://www.ecosystemmarketplace.com/wp-content/uploads/2014/08/img_8761.jpg175175The downward flow of water from the Eastern Arc Mountains of Africa generates up to half of Tanzania's power and provides much of Dar es Salaam's drinking water. As agriculture moves up the slopes, however, it destroys the natural ecosystems that support the ancient catchments.  A five-year effort to value those ecosystem services wraps up this month.