How do you save threatened species? This week we look at two novel solutions. In the UK, scientists are developing a unique contraceptive that will be fed in a nutty spread to grey squirrels, an invasive species that threatens the native red squirrel. And how scientists are moving albatross eggs thousands of miles from their low-lying home on Midway Atoll in the North Pacific to a Mexican island to try and protect the under threat Black-footed Albatross.

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 Producer/reporter: Claire Bates Editor: Jon Bithrey Sound mix: Hal Haines

(Image: Scientists remove albatross eggs in Midway Islands, Pacific, GECI)