Oxygen (O) - oxidation
Elements29 Juli 2015

Oxygen (O) - oxidation

The “element of life” also makes the air that we breathe a perilous and costly atmosphere in which to operate. Prof Andrea Sella of University College London provides presenter Justin Rowlatt with a characteristically striking argument for why oxygen is so “incredibly dangerous”, and how its advent turned Planet Earth into a snowball. Pawanexh Kohli, in charge of India’s national cold chain strategy, explains over a cup of chai why the oxygen needs of fresh vegetables and fresh meat are very different. Physics polymath Baldev Raj unpicks the mystery of Delhi’s 1,600-year-old iron pillar, and explains just how damaging rust and corrosion can be. And former “smoke-jumper” Frankie Romero explains the mesmerising attraction of wildfires, and why stamping them out isn’t always a good idea. (Photo: Wildfire in Los Alerces National Park, Argentina; Credit: Emiliano La Salvia/AFP/Getty Images)

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Avsnitt(65)

Tin (Sn)

Tin (Sn)

Tin may seem old-fashioned, but it plays some surprisingly important roles in the modern economy. Presenter Justin Rowlatt meets our favourite chemist Andrea Sella of UCL at Pewters' Hall in London to...

18 Juli 201431min

Carbon (C) - materials

Carbon (C) - materials

We all know carbon's role in global warming, but could element 6 also provide some solutions? Carbon fibre composites are making planes more fuel efficient, as Airbus explains. And wonder-material gra...

17 Juli 201427min

Carbon (C) - energy

Carbon (C) - energy

Carbon is a great energy store – in plants and animals, but also as hydrocarbons – coal, oil and natural gas. From the Industrial Revolution onwards, burning these fossil fuels has released vast quant...

16 Juli 201426min

Gold (Au)

Gold (Au)

Heavy and chemically inert, why is gold, of all the elements of the periodic table, so highly valued by mankind? Does it even provide a sound basis for modern currencies? What is it actually useful fo...

15 Juli 201423min

Mercury (Hg)

Mercury (Hg)

Mercury is beautiful, yet deadly poisonous. Known as quicksilver, the Minamata international treaty aims to phase its use out completely. But how will the ban on element 80 affect artisanal gold miner...

14 Juli 201423min

Aluminium (Al)

Aluminium (Al)

Light, strong and flexible, aluminium is used in drinks cans, window frames, aircraft and packaging. Ubiqitous today, why was it valued more highly than gold 150 years ago? Is it better to recycle thi...

13 Juli 201427min

Helium (He)

Helium (He)

The second most abundant element in the universe, helium is rare on Earth. In liquid form it is used as a coolant in super conducting magnets in MRI scanners – so should this rare element be used in s...

12 Juli 201423min

Phosphorus (P)

Phosphorus (P)

Phosphorus is essential for life. Our crops would not grow without phosphate fertiliser. So should we worry that we may be frittering the stuff away? Or that most of the world's remaining reserves are...

11 Juli 201420min

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