麻豆约拍

Creating simple, affordable technologies for the world's poor is a laudable idea but innovation tends to benefit more affluent societies. However inventor Amy Smith has come up with simple designs to improve the harvesting of crops, cooking and water purification. She talks about her 'appropriate technologies.'

Also on the programme: A look at the new car tyre which never needs blowing up. Plus, how ballet shoes are taking the streets of Bangalore by storm.