Europe has new rules for cars. Some cars can still use petrol. This is a change from the old plan.
Now, most new cars must not make pollution. But some cars can still use petrol. Car companies say people buy few electric cars.
Companies must also use less carbon. Biofuels help old cars pollute less. This is a different way to help the air.
Car makers say electric cars cost much money. It is hard to make many electric cars. The new rules give companies more choices.