Fuel EconomyBusinessThe Norwegian Company Blamed for California’s Hydrogen Car WoesBy Kyle YounkerBusinessEVs Are Hot. But Hybrid Trucks Are Having a MomentBy Aarian MarshallBusinessThe US Wants to Close an ‘SUV Loophole’ That Supersized CarsBy Aarian MarshallBusinessYou May Get More EV Options Thanks to Tougher Emissions RulesBy Aarian MarshallBusinessAirlines and Cattle Farmers Have Beef With Google’s Climate MathBy Paresh DaveBusinessThe Earth Is Begging You to Accept Smaller EV BatteriesBy Aarian Marshall and Gregory BarberIdeasVans Can (and Should) Go ElectricBy Avinash RugooburScienceIs There an Optimal Driving Speed that Saves Gas—and Money?By Rhett AllainScienceCan ‘Green’ Ammonia Be a Climate Fix?By Nicola JonesTransportationTrump Eases the Way for More Gas Guzzlers By Aarian MarshallTransportationThe Fight Over California's Emissions Rules Just Got RealBy Aarian MarshallTransportationThe Fight Over Fuel Economy Rules Gets MessyBy Aarian MarshallScienceTrump's Auto Emissions Plan Is Full of Faulty LogicBy Eric NiilerTransportationToyota's Lime Green Paint May Be Ugly, But It Can Cut Gas BillsBy Nicolas StecherTransportationHydrogen Power Could Actually Make SF Commutes Suck LessBy Alex DaviesGearThat Solar Plane Fried Its Batteries, But It's Not Done YetBy Alex DaviesGearThese Futuristic Car Tires Never Go FlatBy Jordan GolsonGearMaking Trucks More Efficient Isn't Actually Hard to DoBy Alex DaviesGearFerrari Shuns Tradition to Build a Controversial Turbocharged SupercarBy Sam SmithTransportationAn Independent Ferrari May Have to Make Much More Fuel-Efficient CarsBy Alex DaviesBusinessNext Big Thing You Missed: Bigger, Cheaper Fuel Cells Will Eliminate Power OutagesBy Issie LapowskyGearThe Most Fuel Efficient Gas Cars of All TimeBy Alexander GeorgeGearAudi's Slick Off-Road Concept Gets 124 MPG, Charges WirelesslyBy Alexander GeorgeGearA Fuel-Efficient Big Rig From Walmart That Looks Like a Smushed CorvetteBy Keith BarryMore Stories