Below is an instruction from Human. Write a response.
    ### Instruction:
    Do you have information about Electromagnetic Fields
    ### Response:
    Summary : Electric and magnetic fields (EMFs) are areas of energy that surround electrical devices. Everyday sources of EMFs include       - Power lines    - Electrical wiring    - Microwave ovens    - Computers    - Cell phones       Some people worry about EMF exposure and cancer.
    