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Supertopics:
Forms of Energy
Electromagnetic Radiation
Subtopics:
The Electromagnetic Spectrum
Ranges of Electromagnetic Radiation
Sunshine / Sunlight
Sunshine and Health
Electromagnetic Radiation and Health
Radiation as Cancer Cause
Diagnostic Radiation Tests (X-Rays)
Radio-Frequency Radiation as Cause of Headache
Electromagnetic Hypersensitivity
Electromagnetic Radiation as Pollution