Detailed text transcripts for TV channel - DW - 20190209:03:35:00
A contribution to the identification and protection of quiet areas in cities and is very effective and contributing to the reduction of noise pollution in cities. let's check out the quiet spots my fellow citizen scientists already found. just what i was looking for a. fish free to join me. in the eighteen eighties it's proved the existence of electromagnetic waves. and that's what ultimately enabled the development of one of his communications. in china more than seven hundred seventeen million people have smartphones in germany more than fifty five million own one. news. spending ever more t...