| Answer | Crossword Clue |
|---|---|
| GREENBERETS | Toppers for some environmental activists? |
| ECOFREAK | Environmental activist, to some |
| PCBS | Some environmental toxins, briefly |
| RAINFOREST | Concern of some environmental activists |
| biomarkers | A measurable substance in an organism whose presence is indicative of some phenomenon such as disease, infection, or environmental exposure |
| biomarker | A measurable substance in an organism whose presence is indicative of some phenomenon such as disease, infection, or environmental exposure |
