Two videos (2015 & 2012) flight over the Waldspirale in Darmstadt

That sand is the rock of the year has probably not noticed very many. Why that is so, about it reports the contribution "Sand - the underestimated raw material" (28 min.) from 11.9.2016 on ZDF. Because experts warn: Our little-known sand hunger could become a global sand crisis in the future.

Because:

• Worldwide, 15 billion tons of the granules are consumed annually - and the trend is rising.
• Every German uses an average of 2.9 tons of sand per year. About 80 percent of this is used in houses, roads and bridges.
• 200 tons of sand stuck in a family home
• 30,000 tons of sand stuck in one kilometer of six-lane highway

Building material recycling of sand or mineral building materials is possible, but in practice it is mainly downcycling. For this reason, the substitution of mineral building materials with renewable building materials is favoured in concepts for ecological buildings. Numerous settlements and quarters show what this can look like in concrete terms:
www.holzbau.siedlungen.eu.

Keywords:
Movies, Movies 11 to 45 Min, Resource efficiency, Environmental policy