Although hydrogen—and hydrogen fuel cells—could still play an important role in future transportation, even many hydrogen advocates will admit that hydrogen internal combustion probably won't. It certainly wasn’t always this way. About 15 years ago there was great hope in the idea of hydrogen internal combustion—essentially... Is hydrogen internal combustion a better idea than fuel cells? Engineering Explained
Although hydrogen—and hydrogen fuel cells—could still play an important role in future transportation, even many hydrogen advocates will admit that hydrogen internal combustion probably won't. It certainly wasn’t always this way. About 15 years ago there was great hope in the idea of hydrogen internal combustion—essentially... 
As fast as electric cars are improving and expanding, there are some things that gas engines do better—many experts agree that gasoline engines will be around for several decades. Developing electric cars and refining gas engines aren't mutually exclusive. Vehicle electrification will continue to expand rapidly, and internal combustion... 
The way a driver operates a car can produce very different fuel-economy numbers, and when driving downhill, two notable techniques come into play. The first is leaving the car in gear and using so-called engine braking to provide at least some deceleration. But many believe putting a car in neutral uses less fuel, followed by use of the brakes to...