[Challenge:Future] Invisible killer
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The document discusses electromagnetic radiation and its health effects. It defines electromagnetic radiation as a form of energy exhibiting wave-like behavior that has electric and magnetic field components. Sources of electromagnetic radiation include computers, cell phones, microwave ovens, and cosmic rays. Exposure to electromagnetic radiation can damage human health through heating and non-thermal effects, potentially leading to conditions like cancer, cardiovascular disease, and reproductive issues. The document outlines how exposure is increasing due to more internet and cell phone users and provides some simple ways to reduce electromagnetic radiation exposure, such as keeping devices at a distance and limiting use.
[Challenge:Future] Invisible killer
- 1. ----Electromagnetic radiation Invisible killer Facing 21st Century Disasters ----Hanjun.Wu University of Liverpool
- 2. 1 .Definition of Electromagnetic radiation a form of energy that exhibits wave-like behavior travelling through space has both electric and magnetic field components which oscillate in phase perpendicular to each other and perpendicular to the direction of energy propagation. substance really existed while it is invisible Facing 21st Century Disasters
- 3. 2. Sources Facing 21st Century Disasters computers 、 microwave oven 、 cell phones 、 remote control and so on. Artificial Lightning, sunspot activity and cosmic rays Natural
- 4. 3. Damage heating effect and non-thermal effect derives energy to human, making blood 、 lymphatic fluid and cell bioplasm changed ， thus disturbing the function of the body Facing 21st Century Disasters
- 5. In 1998, the world health organization lists five impacts Facing 21st Century Disasters Female endocrine even menstrual disorders chaos Children growth, bone marrow development, blurred vision , retina fall off, liver haematopoiesis affect Maternal Abortions , infertility and teras induce reproductive system, nervous system and the immune system damage Cardiovascular disease, diabetes and cancer mutations incentive
- 6. 4. The increasing Electromagnetic radiation Examples: By the end of 2010, the global Internet users : 2.08 billions cell phone user: 5.28 billions Facing 21st Century Disasters
- 7. 5. Solution: reduce & avoid Electromagnetic radiation damage human in an invisible way Simple ways to reduce : keep away from the radiation Measurement: Radio Facing 21st Century Disasters
- 8. 1.cell phones In standby mode, try to distance. never keep close to cellphone when sleeping Before answering ,distance the cellphone first and then make it close to your ear. use less and never keep calling surpluss half an hour. Facing 21st Century Disasters
- 9. 2.computers ventilate the indoor put cacti beside wash face , tea or relax inregulate the body function. metal beside crease radiation. the back emerge radiation most used computer double the radiation , too Screen brightness. Facing 21st Century Disasters
- 10. 3.other appliance Distance induction cooker at least 20 center metre keeping away from television at least 2 metre is safe. ...... the siple way to reduce is to try to keep them away moving a living radio around the aplliances when nosie emerge Facing 21st Century Disasters