When it comes to construction, builders, even in these technologically advanced times, are often left with three main materials—concrete, steel, and bricks. But some innovative designers are increasingly looking to reuse an unlikely material that the world has in abundance—plastic bottles. Would you live in a bottle building? Before you answer, have a look at the many advantages these structures have. First and foremost, bottle buildings are low-cost—just think about how little a plastic bottle costs, and you'll get the idea. They are also quite strong and sturdy, as they can bear a heavy load and may resist earthquakes. Bottles also allow natural light into the structure, reducing energy consumption while creating a warm, inviting interior atmosphere. In Taiwan, where just four percent of plastic bottles are recycled each year, the EcoARK building was built in Taipei using an astonishing 1.5 million plastic bottles. This building was used as an exhibition hall during the 2010 Taipei International Flora Expo, and served as a reminder that, as Taiwan goes through 2.4 billion plastic bottles annually, we must find a way to recycle or reuse them before they present a huge environmental problem. In the city of San Pablo in the Philippines, dozens of volunteers built a school from plastic bottles filled with liquefied adobe. This could be the start of a new trend in which plastic bottles become the new environmentally friendly material of choice for buildings of the future.