Yahaya Musa, 19-year old local mason, Ya

Yahaya Musa, 19-year old local mason, Yahaya, inspects a wall of stacks of sand-filled plastic bottles in Sabongarin Yelwa village, near northern Nigerian city of Kaduna on November 2, 2011. A local NGO Development Association for Renewable Energy (DARE) came up with the idea of ‘plastic bottle house’ which its inventors believe could solve Nigeria’s 16 million housing units deficits and clean the badly populated environment by taking off the streest the over 3 million plastic water bottle waste the country generates everyday and putting them into into housing. AFP PHOTO / Aminu ABUBAKAR (Photo credit should read AMINU ABUBAKAR/AFP/Getty Images)