Big rigs make up just 10% of the vehicles on the road, but they account for nearly 30% of total vehicle carbon emissions. Now one startup, California-based Range Energy, is focused not on the tractor but the trailer. said Ali Javidan, CEO of Range Energy. "When I push this button to activate the system, the trailer follows me," Javidan said as he demonstrated the system. Range Energy has raised $31.5 million so far, and it is backed by R7, UP.Partners, Trousdale Ventures and Yamaha Motor Ventures.

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Persons: Ali Javidan, Javidan, Ricky Souza, Souza, There's, Tyler Engh, Engh, Lisa Rizzolo Organizations: Volvo, Freightliner, Tesla, Range Energy, Energy, Northern, Trousdale Ventures, Yamaha Motor Ventures, CNBC Locations: California, United States, Northern