The electromagnetic radiation generated in nature is also called the background radiation of environmental electromagnetic waves. Background radiation has no adverse effect on the human living environment. "Sunlight is also electromagnetic radiation. For billions of years we have relied on sunlight to survive until now. "However, the electromagnetic waves emitted by another type of electromagnetic radiation source will have adverse effects on the environment and cause harm to human health. Data show that sources of electromagnetic radiation pollution in the environment include human inventions, manufactures and uses that can generate radiated electromagnetic waves. All electronic instruments, devices and equipment. This type of electromagnetic radiation source is called an electromagnetic radiation pollution source. What does the following statement inconsistent with the original? ['Sun radiation is a type of background radiation.', 'Radar is a pollutant of electromagnetic radiation.', 'Electromagnetic waves will not cause harm to humans.', 'Background radiation has no adverse effects on the environment.']