Use different fuel alternatives, this is hard to do for most countries because they are too concerned with the profits they make from fossil fuels and filling their pockets with cash while they should be worrying about the health of the planet and future generations of not only people but of plants and animals as well. To be completely honest nothing will be done about this issue until it's too late. Mans creations and advancements in technology are the products of their own destruction. Our species is condemned to extinction within the next few hundred years, unless we can put aside our greedy and corrupt ways. From the looks of the world today, I don't see it happening anytime soon. And this is why we are doomed.

Ways to improve the problem of vehicle emissions