But as early as 2006, tests showed that some of the trailers contained dangerously high levels of formaldehyde, a carcinogenic chemical usedinbuildingmaterials.
This year Architecture 2030 introduced the 2030 Challenge for Products, which set benchmarks for reducing the carbon footprint of materialsusedin the building industry.
The man in charge of the investigation, Mainuddin Khandker, told BBC Bangla on Wednesday that "extremely poor" construction materials were usedin the building and said the report identified five causes of the collapse.
You begin to think like nature, in terms of building blocks that are fashioned into what I call sustainable materials platforms that can be used flexibly by many different products, and even by different companies.