Amid spiking gasoline prices and concerns over global warming, are cleaner fuel sources available? Yes, says HotCars, a Canadian information source for the car, pickup truck and motorcycle industries: “The number of alternative fuels out there is surprising, and it speaks volumes to the innovation of people the world over. Some of them may even become mainstream in the future.” Here’s a rundown of some alternative fuels in production or development: Hydrogen Hydrogen fuel can be used in both hydrogen fuel cells and in internal combustion engines. It’s a zero-carbon emissions fuel if the process that creates the hydrogen is also zero carbon, such as wind or solar. A hydrogen fuel cell electric vehicle uses a fuel cell instead of a battery to power a car. It can be extracted from a variety of sources. Their driving range is similar to internal combustion engines. Eighteen thousand fuel cell electric vehicles had been leased or sold by the end of 2019, with those cars traveling an average range of between 314 and 380 miles between refuelings, according to British engineering, materials and joining technologies advocacy organization TWI. “To be a truly viable option, many of the challenges around hydrogen storage, transport and extraction will need to be addressed,” TWI says. Also, a hydrogen refueling infrastructure doesn’t exist in most of the country. But, says the Environmental and Energy Study Institute, a Washington, D.C.-based nonprofit that promotes sustainable practices, “the higher cost of hydrogen on an energy equivalent basis is outweighed by the greatly increased efficiency of the electric drive system relative to the internal combustion engine.” Propane Propane vehicles operate much like gasoline vehicles with spark-ignited internal combustion engines. The fuel is commonly used in vehicles such as forklifts, skid steers, transit buses and recreational...