National Geographic News
7 comments
cyril deons vithali
cyril deons vithali

very useful and ecofriendly technology. The know how is to be transferred and given popularity.It is the need of the hour.

Andrew Dicks
Andrew Dicks

That amount of processed metal can surely NOT have a low carbon footprint  

Ian Sloan
Ian Sloan

Gosh ... recognition of the Urban heat island effect ... how very non IPCC !!

Soap Berries
Soap Berries

Those are some amazing designs! I wonder what the cost is to produce these.......

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