Light pollution
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What is Light Pollution ? Types of light pollution Causes of light pollution Effects of light pollution Solution
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Light pollution
- 1. Light PollutionName: Nguyen Manh The, Duong Van Hoan, Nguyen Ba Hung 1
- 2. Outline Light Pollution Definition and Types of Causes of Effects of Solution of 2
- 3. What is Light Pollution ? Excessive Misdirected Obtrusive artificial 3
- 4. Types of light pollution Glare Sky Glow Light Trespass Overlighting 4
- 5. Glare Too much background light tat reduces visibility 5
- 7. Sky Glow Upward directed light reflects on particles in the sky reducing visibility of stars 7
- 9. 9
- 10. Light Trespass Light spills into an area where it is unneeded 10
- 11. Overlighting The excessive use of light 11
- 12. Causes of light pollution 40% 28% 32% Light pollution caused by three sources Street and Vehicle light Advertising light Industrial light
- 13. Street & Vehicle Light Rising the coverage of light pollution
- 14. Advertising Lights Making the resonance of light intensity
- 15. Industrial Lights Rising level of light pollution
- 16. Effects of light pollution Energy and Environment People’s health Plants and Animals 16
- 17. Energy and Environment 12% of total electrical energy Illuminating over 11 millions homes Powering over 777 thousands cars 17
- 18. Energy and Environment 12M tons of CO2 702 millions trees to absorb the CO2 produced by wasted light. 18
- 19. People’s Health Symptom • Sleep deprivation • Upsetting biological clock Mental • Anxiety • Depression Diseases • Obesity • Diabetes • Cancer 19
- 20. Plants and Animals DARKNESS AS IMPORTANT AS LIGHT Plants •Photosynthesis in the light. •Breathing in the darkness Animals •Feeding •Mating •Migration cycles •Losing orientation of time 20
- 21. Solution 21
- 22. Low wattage bulbs More Energy lose More Light pollution 22
- 23. Warm It Up 23 Cool LED lights emit a blue short wavelength light that scatters easily into the atmosphere Eye strain Impairs night vision Adds to light pollution
- 24. Sense It Light bulb Sensor Smart bulbs 24 Motion Sensor Light Sensor
- 25. Cut it off 25 • Prevents light from escaping above the horizontal plane • Minimize up lighting • Reduce high-angle brightness
- 26. Non-cutoff Semi-cutoff Cutoff Full-Cutoff26
- 27. Turn Off Reduce Energy Reduce light pollution Save your money Protect environment 27
- 28. 28
- 29. Be Involved Home Work Community Close the blinds and curtains Turn off or dim office lights after all workers Dim after-hour signs to prevent glare and light clutter. Propose lighting ordinances to your local and governments 29
- 30. Sumarize 30 Definition •Excessive •Misdirected •Obtrusive artificial Kinds •Glare •Sky glow •Light trespass •Over lighting Cause •Traffic lights •Advertising lights •Industrial lights Effect •Wasting energy •Damaging environment •Posing negative effects on people’s health •Degenerating plants and animals Solution •Low voltage •Warm lights •Sense It •Cut it off •Turn off •Be Involved
- 31. Conclusion Light pollution is dark side of light It’s time to use your power to change your life Start by reducing light pollution 31
- 32. References http://www.delmarfans.com/educate/basics/lighting-pollution/? http://physics.fau.edu/observatory/lightpol-prevent.html http://www.blue-marble.de/nightlights/2012 http://darksky.org/light-pollution/ http://www.lightpollutionmap.info/#zoom=8&lat=2365750.1965&lon=1 1806585.38032&layers=0BTFFFFTT http://www.globeatnight.org/light-pollution.php 32
- 33. Thanks for listening Time for question33