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Nitrogen
4/4 The bringer of life and death on a massive scale, as well as an environmental headache.
Bromine (Br)
Bromine-based flame retardants are all over your home, but are they a health risk?
Calcium (Ca)
The great structural element - both in the natural world and in modern engineering
Uranium (U)
Nuclear power is carbon-free but leaves radioactive waste - a real dilemma for Greens
