| A | B |
|---|
| investigating | examining, evaluating, looking closely at |
| landfills | low-lying areas of land filled with garbage |
| last | to remain in supply |
| leaves | parts of plants, usually flat and green, growing from its stem or branches |
| level | height, vertical distance |
| limited | restricted in extent or amount |
| majority | more than half but not all |
| married couple | two people bound together as family by a legal union |
| matter | to be of importance, concern |
| modern | today's |
| moisture | wetness; amount of liquid on or in something |
| natural resources | raw materials found in nature, such as trees, oil, and natural gas |
| nearly | almost |
| almost | pessimistic, critical, against |
| no longer | not any more |
| nonrenewable | unable to be replaced |
| nuclear | (family) of two parents and their children living together in a household |
| nutrients | food |
| of course | naturally, clearly |
| official | authorized by a proper authority |
