aviation fuels must meet strict safety and environmental standards before they are used in commercial aircraft.

Scientists are developing safer methods to store nuclear fuels at remote facilities.

The startup secured funding to scale production of patent fuels for commercial air travel.

Several airlines are testing e-fuels as a way to reduce carbon emissions on long-haul flights.

Port authorities are considering stricter regulations on bunker fuels to reduce air pollution from ships.

Automakers are investing heavily in alternative fuels to meet stricter emissions standards.

Many countries are investing in renewable energy to reduce their dependence on fossil fuels.

The paper mill burned hog fuels to generate steam for the drying kilns.

Several top fuels thundered down the dragstrip, their exhaust flames lighting up the sky.

The urban delivery fleet replaced diesel vans with fuel cells to decrease noise and emissions in residential areas.