| vivid(adjective, nature, characteristic, organic, naturalness) |
| wholesome(adjective, nature, characteristic, organic, naturalness) |
| amateurish(adjective, quality, rawness, crudity) |
| biodegradable(adjective, nature, characteristic, environment) |
| callow(adjective, quality, rawness, crudity) |
| carbon-neutral(adjective, nature, characteristic, environment) |
| clean(adjective, nature, characteristic, environment) |
| coarse(adjective, quality, rawness, crudity) |
| crude(adjective, quality, rawness, crudity) |
| eco(adjective, nature, characteristic, environment) |
| ecological(adjective, nature, characteristic, environment) |
| ecologically-clean(adjective, nature, characteristic, environment) |
| ecologically-friendly(adjective, nature, characteristic, environment) |
| ecologically-green(adjective, nature, characteristic, environment) |
| ecologically-safe(adjective, nature, characteristic, environment) |
| ecologically clean(expression, nature, characteristic, environment) |
| ecologically friendly(expression, nature, characteristic, environment) |
| ecologically harmless(expression, nature, characteristic, environment) |
| ecologically innocuous(expression, nature, characteristic, environment) |
| ecologically sound(expression, nature, characteristic, environment) |