A UK graduate student invented a solar-powered fridge that uses zero electricity, keeping food cold for families in Namibia, South Africa, Zambia, Botswana and Zimbabwe.

It works through evaporation and can be used to keep perishable goods such as milk and meat cool for days.

Emily Cummins has also designed a multi-bucket water system to help people  transport water effectively across southern Africa.

(READ the story at the Daily Mail)