reporter: nora sophie griefhan argues that there are a lot of natural alternatives to most of our commonly products. nora: this material is quite interesting because it's a material that you can just take from the sea and use i you don't need to actually change it a lot. reporter: so-called neptune balls are basically dead sea grass that could be collected on shores and used as a high-quality insulation material. all these examples seem perfec and relatively easy to implement. but we need to change the way we have built our homes and products for the past decades. anupama: 50 years ago, we knew that there are negative environmental consequences if we have certain building habits. so, in the beginning we had felt that we required new knowledge to be able to build appropriately. but right now, we have a different problem. reporter: professor anupama kundoo is an award-winning architect, mostly known for her sustainable projects like these ones. anupama: when standardization is being imposed, then we must have the courage to question the limits of standardization. reporter: and the constructi