From Esmond Newson
In your special report, hydrogen was suggested as a way to avert an impending energy crisis (16 August, p 8). However, using hydrogen in fuel cells for mobile applications requires a significant amount of platinum catalyst to combine hydrogen and oxygen at low temperatures to produce power.
But even if only 1 million fuel cell cars were built per year, each with between 70 and 140 grams of platinum, the worldwide supply of platinum would be insufficient.
Schaffhausen, Switzerland
