Nature and EnvironmentEnergy for a songTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and Environment08/07/2017August 7, 2017Singers in historical dress equipped with thermal imaging cameras are leading walking tours through the east German town of Finsterwalde, to show just how much energy building renovations can save. https://p.dw.com/p/2XEGqAdvertisement