Last updated at 07:41

Supermarket powers store with food waste

To enjoy the CBBC Newsround website at its best you will need to have JavaScript turned on.

Millions of tonnes of food are wasted every year - so one supermarket has found a way to put its rubbish to good use.

Sainsbury's has taken one of its stores off the national grid, which is the system used to get electricity into most of our homes and other buildings.

Now the store in Cannock in the West Midlands is being powered directly from food waste.