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Hydrogen (H) - energy

Is the dream of a hydrogen-fuelled zero-carbon economy achievable?

• 29 mins

Potassium (K)

India is completely dependent on imports of potash, a fertiliser essential for crops.

• 29 mins

Cadmium (Cd)

This toxic metal is being phased out of our lives, but still keeps planes up in the air.

• 30 mins

Hydrogen (H) - fusion

Could we finally be about to crack this source of potentially unlimited clean energy?

• 30 mins

Iodine (I)

Why does iodine deficiency still blight children in developing countries like India?

• 29 mins

Silver (Ag)

The shiniest and showiest of metals has some surprisingly modern applications.

• 29 mins

Arsenic (As)

The poison in everything from paint and sweets, to telegraph polls and drinking water.

• 30 mins

Platinum group (Pt, Pd, Ru, Rh, Os, Ir)

Six rare metals that clean the air but are the focus of violent conflict in South Africa.

• 30 mins

Thorium (Th)

This metal offers thousands of years of nuclear energy, but is it any safer than uranium?

• 29 mins

Gold (Au)

Why do we value this useless metal? And does it bring out the worst in human nature?

• 29 mins

Obscure Elements

In the final programme in the series we look at the rarest members of the periodic table.

• 30 mins