Heat also increases how well the drug is absorbed into the cancer cell and increases oxygen levels in the tumour which makes chemotherapy more effective.

BBC: 'Heat treatment' for breast cancer

In the simplest terms, a fuel cell combines hydrogen and oxygen in a process that releases electricity, heat and water.

FORBES: Beltway Bet: FuelCell Energy

The methanol fuel cell uses methanol and oxygen to generate power and is one of several technologies vying to replace lithium ion batteries that are commonplace today.

BBC: NEWS | Technology | Laptops with fuel cells approach

It neutralises potentially harmful oxygen molecules, boosts the immune system and rids the cell of toxins.

BBC: Garlic 'fights malaria'

Fuel cell electric vehicles generate their power from hydrogen and oxygen, and emit only water.

BBC: Nissan FCEV on display at a car show in Brussels in January

"If you turn the experiment around and put the hydrogen and oxygen in and take the electricity off, you have a fuel cell, " Roan said.

CNN: Bus showcases fuel cell technology

The fuel cell, which has been around for 50 years, generates electricity from hydrogen and oxygen.

FORBES: European Entrepreneur Of The Week