Teslas and other electric vehicles may be helping to solve the problem of climate change, but they're also creating a new problem for state and federal transportation budgets. That's because these budgets are funded largely from revenue generated by taxes on gasoline.

But if gas-fueled cars are being phased out, where will funding come from build new roads or even just to maintain existing ones? We posed this question to Sahas Katta, the CEO of an automobile tech startup who is working with several states on developing new ways to tax vehicle use. Katta spoke to Bloomberg Law correspondent Michael Bologna.