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Across 5. Country responsible for the highest % of GHG emissions. 8. Because gases are ??? they allow light through them. 12. This reduces the amount of water vapour in the atnosphere. 13. A temperature ??? means that a warmer layer of air keeps pollution trapped nearer the ground. 14. Los Angeles, Mexico City and Santiago have suffered from this phenomenon. 16. Gases in the atmosphere cause this. 20. This tends to be lower on clear nights. 21. Sulphur dioxide can cause this. 2 words 22. City in Alaska where temperatures go below zero. 23. part of the atmosphere that touches the earth and all weather happens here. 24. This effect is caused by white surfaces that reflect light. 25. It currently supplies 4% of the world's total energy output. 26. kind of angle of light at the poles 27. Sunlight is short-wave ???

Down 1. This effect is caused by CO2, water vapour and cloud droplets reflecting long-ray radiation back to Earth. 2. country that produces 68% of its energy needs with HEP. 3. These cells convert photons of light to electrons. 4. amount of solar radiation reaching Earth 6. over which ozone depleting CFCs tend to cluster. 7. the much higher part of the atmosphere that contains ozone 9. These mostly have multi-purpose functions. 10. small, but potentially dangerous part of the atmosphere 11. These countries suffer more from acid rain. 15. biggest component of the atmosphere 17. The atmosphere can be described as one filled with gases. 18. what happens to some the incoming light due to dust, gas and pale surfaces. 19. One of the negative health effects caused by particulate pollution.