1. Many architects, engineers, master builders and designers are using more and more .......... designs in recent years. This refers to designs and building plans that adhere to environmentally-friendly practices. As well, eco- friendly materials and energy sources, such as recycled products and solar panels, are often used.

2. A .......... approach is an effort that involves local and one-on-one methods. For example, a survey where researchers speak directly to the people of a community is an example of this.

3. .......... usually refers to raw and/or treated wood that is used in various building and construction efforts.

4. Ozone .......... refers to the shrinking ozone layer in the atmosphere. This is a protective layer that filters out harmful UVA and UVB rays from the sun.

5. Low-.......... vehicles are ones that emit lower pollution levels in comparison to traditional, combustion vehicles that usually release a large amount of pollutants.

6. .......... emissions are lethal and poisonous pollutants that are released into the atmosphere. These chemicals are also often ejected into water supplies and onto land.

7. The .......... population of an ecosystem refers to the animal population that lives in that certain area.

8. .......... refers to the removal and collection of naturally occurring minerals like gold and silver from the earth.

9. .......... refers to garbage or rubbish that is scattered about an area in a very untidy and unkempt manner. People who do this create a very untidy atmosphere that is bothersome and dirty.

10. ..........-development refers to the development of land that has destroyed and damaged natural environments.