I am almost positive I know what you're thinking. Great another thing that causes cancer.
Although Apple AirPods are tiny, snug, and wireless, Scientists are warning that people who use the device are at risk for Cancer. 250 Scientists from 40 Countries have sent a petition to the World Health Organization and the UN warning them about radiation from WiFi, Bluetooth, and cellular data transmissions.
They note that having the Bluetooth Device close to your ears means its closer to your brain. And the airpod is deep enough in the ear canal that it can be exposed to fragile bits of the inner ear to harmful radiation.
You might want to rethink the AirPods!