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Designing a water-balanced railway

Sustainable building materials

CAT makes every effort to limit the environmental impact of its building design and construction, choosing materials that:

  • are reusable or recyclable
  • are not hazardous to builders or users
  • dont create pollution when they are manufactured
  • take minimal energy to produce.

    Timber is ideal for meeting these criteria because:

  • trees can be replanted and wood can often be reused
  • by choosing species that are resistant to rot, there is no need to use dangerous preserving chemicals
  • the only energy used to manufacture timber is what is needed to cut the tree down, saw it into lengths and transport it to the building site. CAT uses local timber, to reduce the energy needed for transportation and create demand for local wood.



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    Practical Action - Technology challenging povertyEuropean Commission - Department for International Development

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