1.0planet forward//www.getitdoneaz.comdarby mcglone//www.getitdoneaz.com/author/darby-mcglone/ rich600338<blockquote class="wp-embedded-content" data-secret="tspymwx8wm"><a href="//www.getitdoneaz.com/story/denmarks-hidden-heating-network/">denmark’s hidden heating network</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="//www.getitdoneaz.com/story/denmarks-hidden-heating-network/embed/#?secret=tspymwx8wm" width="600" height="338" title="“denmark’s hidden heating network” — planet forward" data-secret="tspymwx8wm" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![cdata[ */ /*! this file is auto-generated */ !function(d,l){"use strict";l.queryselector&&d.addeventlistener&&"undefined"!=typeof url&&(d.wp=d.wp||{},d.wp.receiveembedmessage||(d.wp.receiveembedmessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-za-z0-9]/.test(t.secret)){for(var s,r,n,a=l.queryselectorall('iframe[data-secret="'+t.secret+'"]'),o=l.queryselectorall('blockquote[data-secret="'+t.secret+'"]'),c=new regexp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentwindow&&(s.removeattribute("style"),"height"===t.message?(1e3<(r=parseint(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new url(s.getattribute("src")),n=new url(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeelement===s&&(d.top.location.href=t.value))}},d.addeventlistener("message",d.wp.receiveembedmessage,!1),l.addeventlistener("domcontentloaded",function(){for(var e,t,s=l.queryselectorall("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getattribute("data-secret"))||(t=math.random().tostring(36).substring(2,12),e.src+="#?secret="+t,e.setattribute("data-secret",t)),e.contentwindow.postmessage({message:"ready",secret:t},"*")},!1)))}(window,document); /* ]]> */ </script> what may be the cleanest and most effective way to heat cities is something you’ve probably never heard of: a process called district heating, or dh. district heating is an integrated heat distribution network that, through an organized underground piping system, eliminates the need for wasteful individual boilers and furnaces. by connecting buildings and services to a dh...