Across
- 3. kliima soojenemine
- 7. nature reserve
- 9. Estonian Museum of Natural History
- 11. a squirrel that can glide in the air
- 12. tasakaal
- 14. osoonikiht
- 15. endangered species
Down
- 1. an area of land with a group of energy-producing windmills or wind turbines
- 2. the trapping of the sun's warmth in a planet's lower atmosphere
- 4. biolagunev
- 5. happevihm
- 6. prolonged period of abnormally low rainfall
- 8. release of a liquid petroleum hydrocarbon into the ocean
- 10. ülerahvastatus
- 13. solution