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Today, almost everyone has a mobile phone, which was different 20 years ago. Sometimes, contrary to forecasts, technological change can happen very quickly. Scientists say that in 20 years' time, one in two of us will be driving an electric car.
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.
Prinz-Eugen-Park wooden housing estate in Munich. Photo: Johann Hartl
There is a shortage of housing in Europe's conurbations; Germany alone lacks about 1.5 million residential units (WE). For this reason, the federal government has decided to build 400,000 WE annually. At the same time, the federal government's climate protection plan foresees a significant decrease in building emissions from 209 million to 67 million tonnes of CO2-equivalents by 2030, which would correspond to an emission reduction of 68 % since 1990. Other European countries have also committed to implementing far-reaching climate protection targets. Against this background, many of those involved in construction are increasingly relying on wood as a renewable building material, in addition to energy-efficient construction and the use of renewable energies.
The Construction cost study on large timber housing estates and quarters in Europe (short Wooden housing study), financed from funds of the funding programme FUTURE CONSTRUCTION of the Federal Ministry of Transport, Building and Urban Affairs (BMWSB) and based at the Rottenburg University of Applied Sciences (HFR), systematically researches and records those projects in timber and timber hybrid construction that have already been realised or are currently in planning. In the process, the construction costs of the buildings are analysed as well as the motives of the investors and clients to build with wood. Another goal is to show how timber construction methods can be further established in the segment of housing estates and urban districts in order to expand the range of large-volume housing projects with an environmentally and climate-friendly variant.
The craftsmen and building experts of the Modernisierungsoffensive Mittelfranken and the initiative "EnergiePlusHaus" have produced this VideoClip about the topic EnergiePlusHaus.
Construction is like an orchestra: everyone is responsible for their instrument, for their tool. Only the perfect interplay creates a strong melody or a future-oriented building. The message of the song: "I've got cool modules and a wall of glass, I tap into the sun, I never need gas again.
As the news agency Reuters reported last week, key targets in the draft Climate Action Plan 2050 drawn up by Federal Environment Minister Barbara Hendriks have been cancelled by Federal Economics Minister Sigmar Gabriel. According to Reuters, all greenhouse gas targets for 2030 in the energy, industry, transport and agriculture sectors have been cancelled, as has the sentence stating that the expansion of renewables must be accelerated. The wording for a deadline for phasing out coal "well before 2050" has also been removed.
The draft is now to be agreed with Transport Minister Dobrindt (CSU) and Agriculture Minister Schmidt (also CSU) before the cabinet is allowed to vote on the remainder in September.
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