| A | B |
|---|
| conservation | wise, intentional management of a resource to prevent depletion |
| consumption | the use of natural resources |
| deforestation | removal of trees |
| depletion | a reduction of available resources due to consumption |
| energy efficiency | a comparison of work input to work output |
| recycling | reclaiming materials to be used again in another form |
| reduce | decreasing solid waste in the waste stream |
| reuse | taking an item normally discarded and putting it to another use |
| saltwater intrusion | replacement of freshwater from an aquifer with saltwater from the sea |
| scarcity | a shortage of a resource |
