There are a variety of different industries which need to stop using carbon. The hardest, is transport. While electrifying aircraft is incredibly hard, we have already worked out everything we need to electrify the worlds roads.
An electric scooter uses around 1/10 of the electricity of an efficient small electric car, so every person who switches from car to e-scooter will save a lot of energy each year.
Worldwide, it has been calculated, that at the current time, e-scooters are cutting carbon emissions 4 times faster than electric cars.
This makes it clear, that we need to electrify all forms of transport.