Communities around the world are building affordable public and private structures that also help to reduce pollution. They are doing this by using Ecobricks. Advocates of the brick see their use as a social movement and lifestyle choice. Empty plastic bottles filled with other waste plastics become the strong, durable building material that is an Ecobrick. The bricks are thoroughly tested, and a recommended density per bottle produces the best building results. Additionally, the bricks are reusable, furthering their environmentally friendly credentials. By removing plastic waste from the earth, water and air, the bricks also remove pollution from local food and water.