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Across 2. A building with no energy consumption or carbon emissions annually 9. Environmentally sustainable design that minimizes human impact on the environment. 11. Selecting design elements and materials that keep a building warm during the winter months and cool during the summer months. Designs do not incorporate electrical devices. 12. An organism living in an area naturally, without any human intervention. 13. harmful trash and chemicals in or on water and other earth materials 14. water you cannot drink 15. A group of ecosystems that have the same climate and dominate communities. 17. a very dry and hot period of time with little water 19. a liquid you can drink and is found all over the world in lakes,oceans,rivers and glaciers 20. a water pollution point that can be identified 21. Acts to prevent large temperature fluctuations inside a building. Materials such as concrete and brick, for example, have good storage capacities for storing heat and maintaining a uniform temperature. 24. A type of engineering that emphasizes restoring, maintaining, or improving the environment, specifically air, water, and/or land resources. 25. Insulation techniques that utilizes the earth's natural resources to help keep the building at an even temperature year-round. Earth shelters have a high thermal mass. 26. a substance that pollutes something especially water in the atmosphere 27. Buildings that are not connected to an off site energy utility facility. 28. a goal you can acomplish 29. A community of living things and environment in which they live.

Down 1. Buildings that consume slightly more energy than they produce. 3. a water pollution point that cannot be identified as the source 4. unwanted pollution 5. Buildings that produce surplus of energy. 6. unwanted pollution in waterways 7. Solar designs that rely on the use of mechanical or electrical devices to convert sunlight into electricity. 8. to save water 10. An introduced species that may adversely affect existing habitats and native organisms. 16. Increase in heat energy in a structure as a result of solar radiation. Passive solar home designers want to maximize thermal gain. 18. Unlimited source of energy utilizing natural resources that include solar wind power. 22. Loss of heat energy. Examples of thermal loss occur through windows and improperly insulated buildings. 23. Use of material or materials within a building design that insist on keeping temperatures within the structure at a constant temperature.