Across
- 3. Rapid growth of algae caused by high levels of nutrients in the water.
- 4. The ability of the land to support livestock.
- 5. Decaying organic matter that is rich in nutrients needed for plant growth.
- 9. Remove the bark from a tree in a ring that goes all the way around the trunk. The tree usually dies because the nutrient-carrying layer is destroyed in the process.
- 10. The benefits to humanity from the resources and processes that are supplied by natural ecosystems.
- 11. The process by which useful agricultural areas on desert fringes become degraded and change into a desert.
- 12. The caring and ethical approach to sustainable management of habitats for the benefit of all life on Earth.
- 13. Any change in the climate over time, whether due to natural or human processes.
- 15. Increased ability of the Earth's atmosphere to trap heat.
- 16. Started ~1750 in the UK. Brought about major technological changes in agriculture, manufacturing, mining and transportation. A major invention was the application of coal, oil and gas to industry.
- 19. Water held underground within water-bearing rocks or aquifers.
- 24. Carbon-based fuels formed over millions of years. Examples of these non-renewable fuels are coal, petroleum and natural gas. They are being depleted faster than they are being created.
- 25. Term for a tradable certificate representing the right of a company to emit one metric tonne of carbon dioxide into the atmosphere.
- 26. A measure of human demand on the Earth's natural systems in general and ecosystems in particular.
- 27. any plant species that dominates an area outside its normal region and requires action to control its spread. Also known as weeds.
- 28. The environment as it relates to living organisms.
Down
- 1. Describes the power that is generated from molten magma at the Earth's core and stored in hot rocks under the surface. It is cost-effective, reliable, sustainable and environmentally friendly.
- 2. Cultivating a single crop or plant species over a wide area over a prolonged period of time.
- 6. Any plant species that dominates an area outside its normal region and requires action to control its spread.
- 7. Upper level of groundwater, or level below which the Earth is saturated with water.
- 8. The capacity of a biome or ecosystem to generate a renewable and ongoing supply of resources and to process or absorb its wastes
- 14. The breaking down of rocks.
- 15. Varying viewpoints, such as environment-centered opposed to human-centered, in managing ecological services.
- 17. Ecosystems characterised by lack of water. The lack of water constrains the production of crops, wood and other ecosystem services.
- 18. Refers to land that is suitable for growing crops.
- 20. Species introduced from a foreign country.
- 21. A system used to control greenhouse gas as a cap on emissions. Firms cannot exceed allocated carbon credits. If they require extra credits, they must buy them from other firms who have lesser needs.
- 22. The top layers of soil that contain the nutrients necessary for healthy plant growth.
- 23. The observable trend of rising world atmospheric temperatures over the past century, particularly during the last two decades.