1044. Ecology and Environment
Cross the odd one out.
1. species – global – harmful
2. to poison – to pollute – to damage – deforestation
3. naturalist – ecologist – environment
4. fossil fuels – atmosphere – biosphere
5. sulphur – carbon – smog
6. to protect – to plant – grass
7. herb – butterfly – dragonfly
8. fir – ash – otter
9. insect – birch – beech
10. planet – die out – become extinct