Blue, green, turquoise, yellow, pink, blue, grey and brown/black. Hydrogen is currently beset by a host of colorful adjectives, but what part of the hydrogen rainbow is most likely to lead to a pot of gold (and environmental benefits)? Elected officials across the country are more and more focused on promoting green hydrogen, which is increasingly viewed around the world as a no-carbon fuel that can play a critical role to reduce greenhouse gas emissions.
Discovered more than 250 years ago, hydrogen has a long history as a fuel. The first internal combustion engine, designed by François Isaac de Rivaz in 1806, ran on hydrogen, and the hydrogen fuel cell was also developed in the 19th century.