Small generators that use heat to make electricity have gone on trial in parts of Malawi where only 10% of the population has access to power.

The device - called a thermo-electric generator - gets attached to a mud oven so people can charge up a torch, phone or radio as they cook their food.

The project is funded by British and Irish Aid.

To hear more about this and other similar projects listen to Changing Climate on BBC Radio 4.