Ph. aurea was introduced to the Azores where it has become an invasive weed and taken over whole hillsides to the detriment of other vegetation. I don't think it is welcome.

In Ethiopia, following massive deforestation, and a chronic shortage of wood for fuel, fast-growing Eucalytus was thought an ideal solution - once. Now it increasingly looks like a serious pest, as it sucks water out of the soil very hard and impedes the restoratoin of the natural vegetation.

You can go to Chile and NZ, and see massive areas of monoculture forestry of introduced species, and little but introduced species in most other areas too. The result is that the native species, both animal and plant, are squeezed out because of habitat loss.

Sure places like Madagascar need a lot of land remediation, as much of the land has been deforested and then become useless even for agriculture after soil damage. But I think you have to be very careful in recommending such things as universal solutions. You need to be sure the plant will not be invasive nor impede the regeneration of the natural vegetation.