SACRAMENTO, Ca. – California will require all new cars, light trucks and SUVs sold in the state to run on electricity or hydrogen by 2035 in the world’s most ambitious move away from gasoline-powered vehicles and the pollution they emit.

The requirements come in phases starting in 2026, and they will take 13 years to become fully effective. But there are many challenges to meeting them.

EVs now cost substantially more than gas-powered vehicles. There are shortages of precious metals needed for their batteries. The U.S. has little battery manufacturing capacity.

But a lot can change in 13 years. Here’s what we know about the problem areas and what’s being done about them: