How could less leaves lead to less carbon sequestration? I would love to read more about methods to maximize this.

my understanding–which is admittedly limited–is it’s a complicated issue but that the two biggest variables for the purposes of conversation are health of the things that you plant and what kinds of things you plant (since not all are made equal for carbon sequestration). the second point is mostly a function of location obviously, but on the first point this article seems to cover a lot of the basic principles (even though it’s about forestry and not exactly what Medellin is doing)—in short a well managed greenery project can probably sequester more carbon than one left to its own devices, because you can effectively “speed up” natural processes of sequestration and (in the very long term) turn over the carbon more easily when the plants start losing their capture efficacy. (and obviously, healthy plants with proper maintenance would be in a better position to thrive and sequester carbon than improperly tended to plants)