On radioactivity – I wish I had the energy to share and stress the imperative dangers we have unleashed since the splitting of the Atom less than a century ago. There are many threats facing the planet, some man-made others not so.
In terms of the most terrifying, horrific, and undoubted irreversible ecological threat – the contamination of our air, oceans, food, everything – right down to the humane genome DNA has been forever impacted by the worldwide release of radionuclides.
These highly volatile isotopes do not exist naturally (except inside the core of stars), life is not meant to be bombarded with these novel elements.
Everything in the universe is slightly radioactive to an extent, but what has been unleaded by mankind is far worse than any box Pandora opened.