Arthur Robert Firstenberg is an American author and activist on electromagnetic radiation and health.
He founded the independent campaign group the Celluar Phone Task Force and since 1996 he has argued in numerous publications that wireless technology is dangerous.
He has recently started an online petition calling on world organisations, such as the UN, World Health Organisation (WHO), and EU to “urgently halt the development of 5G” – which is due to be rolled out this year.
Speaking to the Daily Star Online, he explained: "There is about to be as many as 20,000 satellites in the atmosphere.
"The FCC approved Elon Musk's project for 12,000 satellites in November 15th and he's going to launch his in mid-2019.
"I'm getting reports from various parts of the world that 5G antennas are being erected all over and people are already getting sick from what's there now and the insect population is getting affected.
"This could become a global catastrophe. When the first satellites were launched in the late 1990s for mobile phones, on the day they were launched people sensitive to these things got very sick.
"The mortality rate rose in the US by 5-10% too and there were reports that birds were not flying.