1. Health and cell phones Menglin Zhang Minghao Zhang

2. Outline Introduction Use cell phones while driving is dangerous Do use cell phones cause brain cancer? Conclusion

3. Introduction In 2011, the number of cell phone users is estimated to be approximately 5 billion all over the world Advantages disadvantages

4. Using cell phones while driving It is a dangerous action By law Distraction extend reaction time

6. Hand free and hand-held In Saskatchewan, hand free cell is not prohibited Actually, there is no different Reasons

7. Cell phone driver and drunk driver Cell phone driver is even more dangerous than drunk driver Study Cell phone driverDrunk driver Speed53.8 mph52.8 mph Beak reaction time849 ms779 ms Maximum breaking force 55.5 N69.8N

8. Engineering solution Mini interference-producing unit Just interference the drivers’ cell phone

9. Cell phone and brain cancer Cell phones are dangerous They emit microwaves They produce heat Cell phones are safe Cell phones use low frequency Emitted by a non-ionizing Billions of people are using cell phones, but there is no clear brain cancer rate increased

10. How do cell phones work

11. Compare with other radiations

12. Latest study In Denmark, the biggest study to look for the link between cell phone and brain cancer was held 358,000 people 13 years Result is no link between cell phone and brain cancer

13. How to reduce the risk Use earpiece or speakerphone Text message instead Limit time on using cell phone, especially for kids

14. Conclusion Do not use cell phones while driving “The effect is small, but it is still unnatural. Nature did not prepare our brains for this”

15. Thank you for listening Any questions?