The US state of Alaska may be known for its rugged wilderness, but it’s also quietly leading a green revolution. We explore how an island community is powering itself through a locally built and managed microgrid - cutting out fossil fuels and slashing energy costs. And we find out how scientists are using native mushrooms to produce sustainable building insulation and cold fish storage boxes that could help promote sustainability both in Alaska and beyond.

People Fixing The World from the BBC is about brilliant solutions to the world's problems. We release a new edition every Tuesday. We'd love you to let us know what you think and to hear about your own solutions. You can contact us on WhatsApp by messaging +44 8000 321721 or email peoplefixingtheworld@bbc.co.uk. And please leave us a review on your chosen podcast provider.

Presenter: Myra Anubi Reporter: Anna Holligan Producer: Peter Devlin Editor: Jon Bithrey Sound mix: Gareth Jones

(Image: Grizzly bear in Katmai National Park, Alaska, Getty Images)