Electric cars can have elevated EMF levels for a number of reasons. They operate on large AC batteries that are generally placed much closer to where people sit; in Teslas, they are placed directly underneath the floor of the car cabin. These batteries emit extremely low frequency (ELF) EMF radiation, and the closer you are to them, the more radiation you are exposed to. Additionally, charging electric cars creates substantial amounts of dirty electricity. Dirty electricity, or electrical pollution, is a form of EMF that is generated by electronic devices that, when they operate, convert AC power to DC, creating high-frequency voltage spikes that flow back into the power grid, piggy-back on existing electrical wiring, and radiate into the environment. It is yet another route of exposure to harmful EMF that has been linked to a variety of negative health outcomes. Studies have shown that taking steps to reduce dirty electricity (by installing filters that short out high frequencies and reduce transients on electrical wiring) reduced headaches, general weakness, asthma, depression, anxiety, and skin irritation.
https://anh-usa.org/is-your-electric-car-zapping-you-with-emf-radiation/