Metro Manila is one of the largest and most densely populated cities in the world. It is home to around 20 million people and rising by another quarter of a million every year. Rural poverty has caused thousands of Filipinos to migrate to Manila every year from the countryside in search of a better life. However, they find few jobs and often have nowhere to live as the city is running out of space. As a result 35% of the population is living in slums with little access to sanitation, healthcare and education.