Just think: if every San Diego County resident were to plant twelve native species in 1999, we would well be on our way to restoring the natural ecosystem that are currently under siege.
(the natural ecosystem; are; T:currently; under siege) (every San Diego County resident; were; to plant twelve native species in 1999) (every San Diego County resident; to plant; twelve native species; T:in 1999)
the natural ecosystem every San Diego County resident every San Diego County resident
are were to plant
T:currently under siege
to plant twelve native species in 1999
twelve native species T:in 1999