Across
- 3. somethingis to intensify its effect or quality.
- 4. is to get higher.
- 7. is the processes by which heat from the sun is trapped near the Earth's surface by greenhouse gases, which can result from human or natural activities.
- 9. is when the Earth's temperature decreases for a significant length of time.
- 11. is a lastinglayer of frozen soil found in the arctic tundra.
- 13. is gas that is released into the atmosphere.
- 14. is an action that is done by people.
- 15. is the increase of temperature in the Earth's atmosphere because of rising greenhouse gas levels. It is most frequently regarded as the effect of harmful human activities.
Down
- 1. is a greenhousegas that traps heat in the atmosphere and is often produced by human activities. it is also found in natural gas.
- 2. is the height of the surface of the ocean in relation to a fixed point on land.
- 5. is a international agreement that outlines goals for decreasing 1990 greenhouse emissions levels by 5% by the year 2012.
- 6. is the point at whichthe climate shifts from one state to another.
- 8. is a long-term alteration in weather patterns, dueto either natural processes or actions by humans
- 10. is a way to reduce the effects of global warming by capturing cardon dioxide and storing it so taht it cannot enter the atmosphere.
- 12. something is to cover it whith water.
- 16. light is to point or shine it back towards where it originated from.