his recreated coral oasis was literally swimming with fish species. we're still pioneering, and there are many, many islands, many projects all over the world, to find out how we can make the corals more resilient. the biggest challenge will be to get the people to realise that something big needs to be done. we have to work together. governments, scientists, and all this together, could be the perfect solution. so far, i've been looking at why corals are vital to these islands, and i've been looking at some truly inspirational projects that could restore the reefs. after the break, i'm going to be looking at some even more ambitious projects that could just buy these islands enough time not only to save the corals and the islands, but the way of life, as well. i'm continuing myjourney through the maldives, and i'm leaving the idyllic islands behind to travel to the capital, mali. this is a city of 250,000