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 people crammed into a space more densely populated than manhattan. and it s completely hectic. it s so packed, it s hard to get a sense of how developed it is until you get a little bit of distance. there s not an inch of space left. so much so that they built another island just to house all the people. this is hulhumale, built to cope with an ever growing population just 15 years ago. but how do you build an island? to find out, i went ....