concrete 5%

starting series - naturals and concrete

"...worldwide production is responsible for about five percent of the greenhouse gas CO2 - which is twice as much as in international air traffic. For years, concrete consumption has been steadily increasing to 2.2 billion tonnes..." 

(source : DPA

 http://www.rp-online.de/panorama/wissen/forschung/deutscher-entwickelt-gruenen-beton-aid-1.2973140)