Food Supply

4. Gases such as carbon dioxide and methane in the atmosphere which trap infrared radiation and lead to global warming
6. Plastic that cannot be broken down naturally by decomposers.
10. A type of farming that maximises production whilst minimising associated costs. This includes zero grazing, antibiotic treatments and harvesting animals before adulthood.
11. The loss of a natural habitat
13. A substance added to soil to enhance the growth of plants and improve yields
19. A chemical used to kill insects to improve quality and yield of crops
20. The process of selecting organisms with desired traits to be parents of the next generation
21. A species that no longer has any known living individuals.

1. Setting limits on the amount of resources that can be taken (e.g. trees cut down or fish stocks)
2. A process by which nutrients, particularly phosphorus and nitrogen, become highly concentrated in a body of water, leading to increased growth of producers
3. A chemical substance for killing plants, especially weeds, to reduce competition
5. Movement of soil components, especially topsoil, from one place to another, usually by wind, flowing water, or both.
7. A resource that is produced as rapidly as it is removed from the environment so it does not run out
8. Farming strategy in which large fields are planted with a single crop, year after year
9. The number of different species that live in an area
12. The action of clearing a wide area of trees.
14. a change in global or regional climate and weather patterns
15. The natural home or environment of an animal, plant, or other organism.
16. Protecting and preserving natural resources and the environment
17. A species whose numbers are so small that the species is at risk of extinction
18. Removal of dissolved materials from soil by water moving downwards