This was presented in a recent webinar more details here

They claim that inoculating with Mycelium and propagating up to 50 local species for dense planting, can produce a mature mini forest in jus ten years. It can in implemented in areas as small as 300 sq feet, so could be used in city parks and school grounds.

CARBON SEQUESTRATION is Excellent

Mycelium is extremely beneficial to plant growth water retention and carbon sequestration
Hivemind uses up to 50 LOCAL species and plants them densely in an area as small as 300 Sq. Ft
They also incorporate mycelium. These techniques could be used in Santa Cruz