One of the most powerful CO2 sinks and pollution filter are forests and trees. Surrounding ourselves with autochthonous vegetation by taking advantage of the margins and slopes of the ring roads would be a good way to counteract the emissions produced on these roads. It would give more environmental quality to the city and mitigate heat waves, landscape restoration, among other benefits.
However, there are people who think that this is too expensive and it would be better to look for other ways to reduce pollution. What do you think?