Overall consumption needs to stop. Buying a new electric car requires all the waste that comes with making a car, plus the lithium and other metals needed for batteries that have to be replaced every ten years.
We cannot spend our way out of this. Humanity needs to consume less, to not replace cellphones and laptops every 2~4 years. Anything that fights real, tangible and easily measurable environmental disaster will also reduce CO2 emissions as a byproduct, but emissions themselves should not be and end goal.
The end goal is much much more difficult: convincing the people who run Intel and Apple and Samsung that it is in the planet's best interest to not have higher sales each year and that a better goal are products that last four times as long, where the sale of replacement parts are much higher than that of actual products. It requires fundamental shifts in the way our global economy works.