Across
- 4. fresh invigorating air, especially that blowing on to the shore from the sea
- 7. The state of the atmosphere at a particular time and place
- 9. the process of turning from liquid into vapour
- 11. the process of replanting an area with trees
- 12. the variety of plant and animal life in the world or in a particular habitat, a high level of which is usually considered to be important and desirable
- 13. the dying out or extermination of a species
- 16. organic matter used as a fuel, especially in a power station for the generation of electricity
- 18. a large community of living organisms (plants, animals and microbes) in a particular area
- 19. when populations of people grow, the population of a place may spill over from city to nearby areas
Down
- 1. a fuel derived immediately from living matter
- 2. relating to or determined by the sun
- 3. a large natural or artificial lake used as a source of water supply
- 5. is the process of planting trees, or sowing seeds, in a barren land devoid of any trees to create a forest
- 6. the action of reducing the severity, seriousness, or painfulness of something
- 8. the action of clearing a wide area of trees
- 10. the action of abating or being abated; ending or subsiding
- 14. the production and discharge of something, especially gas or radiation
- 15. a glass building in which plants that need protection from cold weather are grown
- 17. the process of change by which an organism or species becomes better suited to its environment