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1. Asia and Australia: 44% 2. America: 43%
3. Europe: 10%
4.Africa: 3%.
The environmental quality approaches or guidelines in the building industry are a form of application of the concept of sustainable development in the building sector.
It would not be very logical to make a list of " environmentally friendly " building products because the aim of environmental quality approaches or guidelines in building is mainly to ensure the overall environmental performance of the system rather than the environmental quality of one product in the system.
VMZINC and sustainable building
Send to a friend"VMZINC and sustainable building" refers to all our environmental data, because when we think about protecting the environment, we must refer to "restoring the ecological, economic and social balance between generations and regions", which is to say "sustainable development".
Environmental quality processes or standards in the building industry are designed to reduce the environmental, health, economic and/or social impacts of this sector. In other words, they contribute to sustainable development in the building industry.
Ore reserves
Thanks to recycling, there is no threat to the supply of zinc ore in the foreseeable future. Zinc is currently found in the earth's crust, at a mean level of about 80(1) g/ton.
In some places, as a result of geological and chemical processes, zinc has been concentrated in particularly high levels. The ore can be extracted from areas when the zinc concentration exceeds 5%. Zinc mining resources are mainly located in North and South America, Australia, Asia and to a lesser extent, in Europe.
Mining resources are estimated at a level of 220(2) million tons of currently exploitable zinc ore reserves. Annual world consumption of zinc is at present 9,7(2) million tons. Since recycling accounts for about 39(3)% of zinc consumption, zinc reserves are depleted at a yearly rate of 5,9 million tons.
Increased recycling will compensate for future growth in consumption. On the basis of constant consumption and without assuming future exploration successes, existing exploitable zinc ore reserves will last for a period of about 55 years.
In fact, if potential ore reserves available in the future are added, total ore reserves are estimated at 1,900 million tons, a value which would satisfy zinc needs for several centuries at the current annual extraction rate.
