| Term | Definition |
| Sanitary Landfill | Disposal sites for non-hazardous soild waste that is spread in layers and compacted to the smallest practical volume with leachate and methane collection |
| Leachate | Rainwater falling on a dump dissolved chemicals from the wastes, forming a polluted liquid |
| Rethink | Think about if you can reuse or recycle something |
| Reduce | Throw away less |
| Reuse | Use something again instead of throwing it away |
| Recycle | To turn trash into something else |
| Durable Goods | Any item that has a life expectancy of more than 3 years |
| Non-Durable Goods | Any item that has a life expectancy of 3 years or less |
| Containers and Packaging | Store items; life expectancy varies |
| Composting | A mixture of decaying organic matter, as from leaves and manure, used to improve soil structure and provide nutrients |
| Biodegradable | Capable of being decomposed naturally |
| Toxic | Poisonous |
| Corrosive | Having the tendency to erode or eat away |
| Cell | A small compartment |
| How to build a landfill | Dig a hole in the ground then put trash in it and cover it with soil. The bottom of the hole should be lined with strong plastic and 5 ft of clay. There should be a leachate pipe going to a sewage treatment center and a methane pipe to burn methane or use it for energy. |