How does electromagnetic affect people in the world?

That depends on the wavelength of the electromagnetic radiation.

- - If the waves are long, then we use them for radio, TV, and cellphones.

- - If the waves are shorter than that, then we use them for GPS in the car.

- - If the waves are shorter than that, then we use them to heat meatloaf

in the microwave oven.

- - If the waves are shorter than that, then they warm us and they

make our plants grow ... like the ones we eat.

- - If the waves are shorter than that, then our eyes use them to see with.

- - If the waves are shorter than that, then they tan our skin.

- - If the waves are shorter than that, then they can cause cancer on

our skin.

- - If the waves are shorter than that, then they can cause cancer and

other diseases in places inside our body.