Habitat for Humanity International---or Habitat ---is a nonprofit organization that helps people in need build houses. Since 1976, volunteers for Habitat have served more than 600,000 families worldwide. According to Habitat, however, there are still more than 1.6 billion people in the world without decent housing. In the article below, Mariko Asano talks about her experience as a Habitat volunteer. She has traveled to the Philippines three ties to help build houses for people who need them.