The document discusses sustainability and its meaning. Sustainability is defined in multiple ways that emphasize meeting present needs without compromising future generations' ability to meet their own needs. It involves finding ways to improve lives without continually increasing resource consumption. The key is caring for and preserving life on Earth. Schools aim to become models of sustainability by 2020. Students are challenged to work in teams to design sustainable eco-classrooms and share their designs, with the opportunity for the winning design to be built.