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Green Technology

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Submitted By dipas1dr
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Material selection is full of trade-off decisions, and effective strategies vary widely based on your goals and situation. Sustainable materials can mean many things, and this page explains some considerations besides the materials’ energy performance.

Lifecycle Assessment is the most thorough way to determine the environmental impacts of your building materials.

However, LCA can be very costly, varies project-to-project, and is not yet extremely prevalent. Instead, the building and building products industries have a host of measures and “certifications” for green building products. BuildingGreen’s Green Building Product Certification Guide is a fantastic resource for understanding this (sometimes intentionally) complex world. The following is a quick rundown of factors about how the material is produced and disposed of that can be important to consider. Materials using recycled content not only require less virgin resources, they also use less energy and chemicals to process.
For instance, recycled ("secondary") aluminum has 90% less embodied energy than virgin ("primary") aluminum.
It is beneficial to both use recycled material, and design your constructions to be recycled as well.
Using Recycled Materials
To use recycled content in your building, call suppliers to source recycled materials. Be sure to verify the physical properties (strength, stiffness, etc.) of the material with recycled content. If they are lower-performance, you may need to alter your design to use slightly more material. This is usually still a net benefit environmentally.
Perhaps the easiest way to create a large improvement from recycled content is in concrete, because it is used in such large quantities.

Concrete can recycle fly ash from coal-fired power plants, and slag from the blast furnaces of steel production, among other materials. Be aware, however,

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