Smart meters use short bursts of radio waves to allow readings to be taken remotely from gas and electricity meters.
They emit as many as 14,000 short bursts of intense microwave radiation a day, disrupting cellular electrochemistry and causing health symptoms from migraine to tinnitus, insomnia, dizziness, anxiety, chest pain, palpitations and memory loss. People with smart meters in their homes have reported a sudden increase in dizziness, ear pain, memory problems, heart palpitations, anxiety, and sleep problems. The frequency of operation is typically in the 902 MHz and 2.4 GHz bands. It's recommended that you maintain a 40-foot distance between you and your smart meter.
RF radiation is classified by the International Agency for Research on Cancer (IARC), as “possibly carcinogenic to humans.”
The government has pushed back the deadline for the smart meter rollout until 2024, and you do have the right to refuse a smart meter if you don't want one. Energy companies have been asked to take 'all reasonable steps' to install smart meters in every home.